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# 20

Number 20 (twenty) is an even two-digits composite number and natural number following 19 and preceding 21.

## Properties of the number 20

 Nominal 20 Cardinal twenty Ordinal 20th Number of digits 2 Sum of digits 2 Product of digits 0 Number parity Even
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## Prime Factorization of 20

 Prime factorization 2 x 2 x 5 Prime factorization in exponent form 22 x 5 Prime factors 2, 5 Number of distinct prime factors ω(n) 2 Total number of prime factors Ω(n) 3 Sum of prime factors 7 Product of prime factors 10
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## Divisors of 20

 List of proper divisors 1, 2, 4, 5, 10 List of all dividers 1, 2, 4, 5, 10, 20 Number of divisors d(n) 6 Sum of all divisors σ(n) 42 Aliquot sum 22 20 is an abundant number , because the sum of its proper divisors (22) is greater than itself. Its abundance is 2.
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## Prime numbers

 Is 20 a prime number? No Is 20 a semiprime number? No Is 20 a Chen prime number? No Is 20 a Mersenne prime number? No
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## Sequences

 Is 20 a Catalan number? No Is 20 a Fibonacci number? No Is 20 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.
 20 is not a Happy number 20 is a Humble number 20 is not a Münchhausen number 20 is not a Perfect number 20 is not a Perfect square 20 is not a Palindrome
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## Numeric Bases of 20

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
2Binary101002
3Ternary2023
4Quaternary1104
5Quinary405
6Senary326
7Septenary267
8Octal248
9Nonary229
10Decimal20
12Duodecimal1812
20Vigesimal1020
36Base36k36
60SexagesimalK60
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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 20 (n2) 400 Cube of 20 (n3) 8000 Square root of 20 4.47214 Natural Logarithm (ln) of 20 2.99573 Decimal Logarithm (log) of 20 1.30103
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 20 0.912945 Cosecant of 20 1.09536 Cosine of 20 0.408082 Secant of 20 2.45049 Tangent of 20 2.23716 Cotangent of 20 0.446995
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## Number parity

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

### Is 20 an Even Number?

Yes, the number 20 is an even number.

### Is 20 an Odd Number?

No
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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 20 in words is "twenty", meaning that: 20 is an aban number (a number without the letter a) 20 is not an eban number (as it contains the letter e) 20 is an iban number (a number without the letter i) 20 is an oban number (a number without the letter o) 20 is not a tban number (as it contains the letter t) 20 is an uban number (a number without the letter u)
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## Numeral systems

How to write 20 in other number systems?
 Bengali numerals ২০ Eastern Arabic numerals ٢٠ Hieroglyphs numeralsused in Ancient Egypt 𓎇 Khmer numerals ២០ Japanese numerals 二十 Roman numerals XX Thai numerals ๒๐
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## Translation

How do you say 20 in 38 different languages?
 Arabic عشرون Croatian dvadeset Czech dvacet Danish tyve Dutch twintig Estonian blaeve Faroese tjúgo Filipino dalawáng pû Finnish kaksi­kymmentä French vingt Greek είκοσι German zwanzig Hebrew עשרים Hindi बीस Hungarian húsz Icelandic tuttugu Indonesian dua puluh Italian venti Japanese 二十 Korean 이십 Latvian divdesmit Lithuanian dvidešimt Norwegian tjue Persian بیست Polish dwadzieścia Portuguese vinte Romanian douăzeci Russian двадцать Serbian двадесет Slovak dvadsať Slovene dvaset Spanish veinte Swahili ishirini Swedish tjugo Thai ยี่​สิบ Turkish yirmi Ukrainian двадцять Vietnamese hai mươi
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## Miscellaneous

 Number 20 reversed 02 ASCII Code 20  Unicode Character U+0014  Unix Timestamp Thu, 01 Jan 1970 00:00:20 +0000
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