Number 18
"About a number" Calculator
What is number 18?
| Number spelling | Eighteen |
| Ordinal spelling | eighteenth |
| Number length | 2 |
| Sum of digits | 9 (1 + 8) |
| Multiplication of digits | 8 (1 * 8) |
| Parity | Even |
| 18 in Roman Numerals | XVIII |
| 18 in Binary | 10010 |
| 18 in Hexadecimal | 12 |
| 18 seconds | 18 seconds |
| Unix Timestamp 18 as a Date | 01/01/1970, 12:00:18 am |
| 18 is a Prime number? | No |
| Previous Prime Number | 17 |
| Next Prime Number | 19 |
| Factorization, All prime factors of 18 | 2, 3, 3 |
| Factors of 18 | 1, 2, 3, 6, 9, 18 |
| Number 18 as QR Code |  |
| Number 18 as Barcode |  |
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See Also
- Number to Binary - Decimal numbers to Binary conversion
- Numbers to Roman Numerals - Decimal numbers to Roman numerals conversion
- Factors of a Number - List all Factors and Factor Pairs of a Number
- Is number a Prime - Find out whether a given number is Prime or not
- Prime Factorization - Prime Factorization Calculator
- Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between
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About "About a number" Calculator
This calculator will show all facts for a given number. For example, it can help you find out what is number 18? Enter number (e.g. '18') and hit the 'Calculate' button.