18
| ||||
|---|---|---|---|---|
Expression error: Unrecognized punctuation character "{". Expression error: Unrecognized punctuation character "{". | ||||
| Cardinal | eighteen | |||
| Ordinal | 18
th (eighteenth) | |||
| Factorization | 2 × 32 | |||
| Greek numeral | Lua error in Module:Greek at line 157: attempt to compare number with nil. | |||
| Roman numeral | XVIII | |||
| Binary | 100102 | |||
| Ternary | 2003 | |||
| Octal | 228 | |||
| Duodecimal | 1612 | |||
| Hexadecimal | 1216 | |||
18 is the number following 17 and preceding 19.[1]
Number written in bases
- Base 2 (Binary): 100102
- Base 3: 2003
- Base 4: 1024
- Base 5: 335
- Base 6: 306
- Base 7: 247
- Base 8: 228
- Base 9: 209
- Base 11: 1711
- Base 12: 1612
- Base 16: 1216
- Base 20: I20
- Base 36: I36
- Base 60: I60
- Base 62: I62
- Base 64: I64
Property
- It is an odd number[2].
- The {{{1}}}th element has not been discovered.
See also
References
- ^ https://www.wolframalpha.com/input/?i=18
- ^ "A005408 - OEIS". oeis.org. Retrieved 27 December 2025.
{{cite web}}: CS1 maint: url-status (link)
External links