Number 18
"Number Facts & Properties" Calculator
What is number 18?
Answer
Number 18 is
an even number
Eighteen
The last digit, 8, is even, so 18 is even: 18 = 2 × 9.
How to read it
Ordinal
eighteenth
Divisibility
no — composite
18 = 2 × 3²
6: 1, 2, 3, 6, 9, 18
Nearest primes
17 and 19
Other notations
XVIII
10010
Digits
Number of digits
2
Sum of digits
1 + 8 = 9
Product of digits
1 × 8 = 8
Codes
QR code
Barcode (Code 128)
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See Also
- Decimal to Binary Converter - 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
- Prime Number Checker - 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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