18 (number)

← 17 18 19 →
← 10 11 12 13 14 15 16 17 18 19 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	eighteen
Ordinal	18th (eighteenth)
Factorization	2 × 32
Greek numeral	ΙいおたΗいーた´
Roman numeral	XVIII
Binary	100102
Ternary	2003
Quaternary	1024
Quinary	335
Senary	306
Octal	228
Duodecimal	1612
Hexadecimal	1216
Vigesimal	I20
Base 36	I36

18 is a number that may NOT refer to:

• 18th century
• Sonnet 18
• 1-18-08

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