No, 16 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
16 has divisors other than 1 and itself. The smallest is 2: 16 ÷ 2 = 8.
Prime factorization: 16 = 2 × 2 × 2 × 2 = 2⁴.
| Number | Prime? |
|---|---|
| 12 | No, 2 × 2 × 3 |
| 13 | Yes |
| 14 | No, 2 × 7 |
| 15 | No, 3 × 5 |
| 17 | Yes |
| 18 | No, 2 × 3 × 3 |
| 19 | Yes |
| 20 | No, 2 × 2 × 5 |
More about 16: factors of 16 · 16 squared · square root of 16 · 16 in binary · 16 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.