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The factors of 18 are: 1, 2, 3, 6, 9, and 18.

Since there are other factors in addition to '1' and the number itself,

the number is composite.
18 is a composite number because it has more than 2 factors
18 is a composite number. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
18 is not prime; it is composite. 18 = 2 * 3 * 3

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More answers

composite The number 18 is a composite number. It is a composite number because composite numbers are whole numbers that have three or more factors.

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Wiki User

8y ago
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Composite

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Navisha Barker

Lvl 2
2y ago
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Prime

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Anonymous

5y ago
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Q: Is 18 composite or prime
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