23 (number)

This article is about the number 23. For the year, see 23.

23 (twenty-three) is a natural number. It comes between twenty-two and twenty-four, and is an odd number. It is also the 9th prime number, after 2, 3, 5, 7, 11, 13, 17, and 19.

← 22 23 24 →
← 20 21 22 23 24 25 26 27 28 29 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	twenty-three
Ordinal	23rd (twenty-third)
Factorization	prime
Greek numeral	ΚΓ´
Roman numeral	XXIII
Binary	101112
Ternary	2123
Quaternary	1134
Quinary	435
Senary	356
Octal	278
Duodecimal	1B12
Hexadecimal	1716
Vigesimal	1320
Base 36	N36