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# 19

Number 19 (nineteen) is an odd two-digits prime number and natural number following 18 and preceding 20.

## Properties of the number 19

 Nominal 19 Cardinal nineteen Ordinal 19th Number of digits 2 Sum of digits 10 Product of digits 9 Number parity Odd
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## Prime Factorization of 19

 Prime factorization 19 Prime factors 19 Number of distinct prime factors ω(n) 1 Total number of prime factors Ω(n) 1 Sum of prime factors 19 Product of prime factors 19
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## Divisors of 19

 List of proper divisors 1 List of all dividers 1, 19 Number of divisors d(n) 2 Sum of all divisors σ(n) 20 Aliquot sum 1 19 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 18.
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## Prime numbers

 Is 19 a prime number? Yes Is 19 a semiprime number? No Is 19 a Chen prime number? Yes Is 19 a Mersenne prime number? Yes: M6
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## Sequences

 Is 19 a Catalan number? No Is 19 a Fibonacci number? No Is 19 a Idoneal number? No
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 19 is a Happy number 19 is not a Humble number 19 is not a Münchhausen number 19 is not a Perfect number 19 is not a Perfect square 19 is not a Palindrome
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## Numeric Bases of 19

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary100112
3Ternary2013
4Quaternary1034
5Quinary345
6Senary316
7Septenary257
8Octal238
9Nonary219
10Decimal19
12Duodecimal1712
20Vigesimalj20
36Base36j36
60SexagesimalJ60
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 19 (n2) 361 Cube of 19 (n3) 6859 Square root of 19 4.3589 Natural Logarithm (ln) of 19 2.94444 Decimal Logarithm (log) of 19 1.27875
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 19 0.149877 Cosecant of 19 6.67213 Cosine of 19 0.988705 Secant of 19 1.01142 Tangent of 19 0.151589 Cotangent of 19 6.59676
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## Number parity

Parity is the property of an integer of whether it is even or odd.

No

### Is 19 an Odd Number?

Yes, the number 19 is an odd number.
Total number of all odd numbers from 1 to 19 is 10
Sum of all the odd numbers from 1 to 19 are 100
The sum of all odd numbers is a perfect square: 100 = 10
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 19 in words is "nineteen", meaning that: 19 is an aban number (a number without the letter a) 19 is not an eban number (as it contains the letter e) 19 is not an iban number (as it contains the letter i) 19 is an oban number (a number without the letter o) 19 is not a tban number (as it contains the letter t) 19 is an uban number (a number without the letter u)
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## Numeral systems

How to write 19 in other number systems?
 Bengali numerals ১৯ Eastern Arabic numerals ١٩ Hieroglyphs numeralsused in Ancient Egypt 𓎆𓐂 Khmer numerals ១៩ Japanese numerals 十九 Roman numerals XIX Thai numerals ๑๙
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## Translation

How do you say 19 in 38 different languages?
 Arabic تسعة عشر Croatian devetnaest Czech devatenáct Danish nitten Dutch negentien Estonian wuiasieke Faroese nítjan Filipino labíng-siyám Finnish yhdeksäntoista French dix-neuf Greek δεκα­εννέα German neunzehn Hebrew תשע עשרה Hindi उन्नीस Hungarian tizen­kilenc Icelandic nítján Indonesian sembilan belas Italian diciannove Japanese 十九 Korean 십구 Latvian deviņpadsmit Lithuanian devyniolika Norwegian nitten Persian نوزده Polish dziewiętnaście Portuguese dezenove Romanian nouăsprezece Russian девятнадцать Serbian деветнаест Slovak devätnásť Slovene devetnajst Spanish diecinueve Swahili kumi na tisa Swedish nitton Thai สิบ​เก้า Turkish on dokuz Ukrainian девʼятнадцять Vietnamese mười chín
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## Miscellaneous

 Number 19 reversed 91 ASCII Code 19  Unicode Character U+0013  Unix Timestamp Thu, 01 Jan 1970 00:00:19 +0000
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