18 (number)

← 17 18 19 →
Cardinaleighteen
Ordinal18th
(eighteenth)
Numeral systemoctodecimal
Factorization2 × 32
Divisors1, 2, 3, 6, 9, 18
Greek numeralΙΗ´
Roman numeralXVIII, xviii
Binary100102
Ternary2003
Senary306
Octal228
Duodecimal1612
Hexadecimal1216
Hebrew numeralי"ח
Babylonian numeral𒌋𒐜
Look up eighteen in Wiktionary, the free dictionary.

18 (eighteen) is the natural number following 17 and preceding 19. It is an even composite number.

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