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Number 23 (twenty-three) is an odd two-digits prime number and natural number following 22 and preceding 24.

Properties of the number 23

Number of digits2
Sum of digits5
Product of digits6
Number parityOdd
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Prime Factorization of 23

Prime factorization23
Prime factors23
Number of distinct prime factors ω(n)1
Total number of prime factors Ω(n)1
Sum of prime factors23
Product of prime factors23
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Divisors of 23

List of proper divisors 1
List of all dividers1, 23
Number of divisors d(n)2
Sum of all divisors σ(n)24
Aliquot sum 1
23 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 22.
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Prime numbers

Is 23 a prime number?Yes
Is 23 a semiprime number?No
Is 23 a Chen prime number?Yes
Is 23 a Mersenne prime number?No
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Is 23 a Catalan number?No
Is 23 a Fibonacci number?No
Is 23 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.
23 is a Happy number
23 is not a Humble number
23 is not a Münchhausen number
23 is not a Perfect number
23 is not a Perfect square
23 is not a Palindrome
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Numeric Bases of 23

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.
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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 23 (n2)529
Cube of 23 (n3)12167
Square root of 234.7958315233127
Natural Logarithm (ln) of 233.1354942159291
Decimal Logarithm (log) of 231.3617278360176
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Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 23-0.84622040417517
Cosecant of 23-1.1817252279265
Cosine of 23-0.5328330203334
Secant of 23-1.8767605644528
Tangent of 231.5881530833913
Cotangent of 230.62966222240028
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Number parity

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

Is 23 an Even Number?


Is 23 an Odd Number?

Yes, the number 23 is an odd number.
Total number of all odd numbers from 1 to 23 is 12
Sum of all the odd numbers from 1 to 23 are 144
The sum of all odd numbers is a perfect square: 144 = 12
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 23 in words is "twenty-three", meaning that:
23 is an aban number (a number without the letter a)
23 is not an eban number (as it contains the letter e)
23 is an iban number (a number without the letter i)
23 is an oban number (a number without the letter o)
23 is not a tban number (as it contains the letter t)
23 is an uban number (a number without the letter u)
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Numeral systems

How to write 23 in other number systems?
Bengali numerals২৩
Eastern Arabic numerals٢٣
Hieroglyphs numeralsused in Ancient Egypt𓎇𓏼
Khmer numerals២៣
Japanese numerals二十三
Roman numeralsXXIII
Thai numerals๒๓
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How do you say 23 in 38 different languages?
Arabicثلاثة و عشرون
Croatiandvadeset i tri
Czechdvacet tři
Danish tre og tyve
Estonianblaeve vɔ etɔ̃
Filipinodalawáng pû’t tatló
Greekείκοσι τρία
Hebrewעשרים ושלוש
Icelandictuttugu og þrír
Indonesiandua puluh tiga
Latviandivdesmit trīs
Lithuaniandvidešimt trys
Persianبیست و سه
Polishdwadzieścia trzy
Portuguesevinte e três
Romaniandouăzeci şi trei
Russianдвадцать три
Serbianдвадесет и три
Slovenedvaset tri
Spanish veintitres
Swahiliishirini na tatu
Turkishyirmi üç
Ukrainianдвадцять три
Vietnamesehai mươi ba
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Number 23 reversed32
ASCII Code23
Unicode CharacterU+0017
Unix TimestampThu, 01 Jan 1970 00:00:23 +0000
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