# Is 18 a Prime Number?

No, **18** is not a *prime number*, it is a composite number.

### Why 18 is not a prime number?

Because **18** has divisors rather than 1 and itself.
18 can be divided by 2 and 3.

Prime factorization of *18* (list of divisors):

*The next prime number* of 18 is **19**

*The previous prime* number of 18 is **17**.

### Related Prime Numbers

Biggest 10 prime numbers smaller than **18**

Smallest 10 prime numbers bigger than **18**

### Related Non-Prime Numbers

Biggest 10 composite numbers smaller than **18**

Smallest 10 composite numbers bigger than **18**