23
Everything about the number 23 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 23
| Nominal | 23 |
| Cardinal | twenty-three |
| Ordinal | 23rd |
| This number as US currency | twenty-three dollars |
Properties (and some facts) of 23
| Is 23 an odd number? | 23 is an odd number |
| Is 23 an even number? | 23 is not an even number |
| Is 23 a palindrome? | 23 is not a palindrome |
| Is 23 a triangle number? | 23 is not a triangle number |
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23 in other bases
| Base 2 (Binary) | 10111 |
| Base 3 (Ternary) | 212 |
| Base 4 (Quaternary) | 113 |
| Base 5 (Quinary) | 43 |
| Base 6 (Senary) | 35 |
| Base 8 (Octal) | 27 |
| Base 12 (Duodecimal) | 1B |
| Base 16 (Hexadecimal) | 17 |
| Base 20 (Vigesimal) | 13 |
Primes and factors tests for 23
| Is 23 a prime number? | 23 is a prime number |
| Is 23 a perfect number? | 23 is not a perfect number |
| Is 23 a Mersenne prime? | 23 is not a Mersenne prime |
| Is 23 a Fermat prime? | 23 is not a Fermat prime |
| Is 23 a Fibonacci prime? | 23 is not a Fibonacci prime |
| Is 23 a partition prime? | 23 is not a partition prime |
| Is 23 a Pell prime? | 23 is not a Pell prime |
| Prime Factors | Prime factors of 23 |
23 in other numeral systems
| 23 in Roman numerals | XXIII |
| 23 in Chinese numerals | 貳拾叄 |
| 23 in Babylonian numerals |  |
| 23 in Egyptian numerals | 𓎇𓏼 |
Roots and squares for 23
| Is 23 a square number? | 23 is not a square number |
| Is 23 a cube number? | 23 is not a cube number |
| Square root of 23 | 4.7958315233127 |
| Cube root of 23 | 2.8438669798516 |
Recreational math for 23
| Number 23 reversed | 32 |
| Sum of the digits | 5 |
| Number of digits | 2 |
Arithmetic tables for 23
Other pages about 23
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