List of Numbers
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Properties of the Number 18
- Because 18 is divisible by 2 ...
- 18 is an even number
- 18 has parity 0
- 18 is not an odd number
- Because 18 can be factored as 2 x 9 ...
- 18 is a composite number
- 18 is not a prime number
Alternative Representations of the Number 18
- Base 2 (binary): 10010
- Base 8 (octal): 22
- Base 16 (hexadecimal): 12
Divisors of the Number 18
- 18 has 6 positive divisors:
1, 2, 3, 6, 9, 18
- The sum of the positive divisors is 39
- 18 has 5 proper divisors:
1, 2, 3, 6, 9
- The sum of the proper divisors is 21
- 18 is not a deficient number
- 18 is not a perfect number
- 18 is an abundant number since the sum of the proper divisors is greater than 18
More Properties of the Number 18
- 18 is not a square number
- 18 is not a cube number
- 18 is not a palindromic number
- 18 is not a Fibonacci number
- 18 is a Lucas number
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