Q: Is 21,354,210 a Composite Number?

Why is 21,354,210 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,354,210 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 30 34 45 51 85 90 102 153 170 255 289 306 510 578 765 821 867 1,445 1,530 1,642 1,734 2,463 2,601 2,890 4,105 4,335 4,926 5,202 7,389 8,210 8,670 12,315 13,005 13,957 14,778 24,630 26,010 27,914 36,945 41,871 69,785 73,890 83,742 125,613 139,570 209,355 237,269 251,226 418,710 474,538 628,065 711,807 1,186,345 1,256,130 1,423,614 2,135,421 2,372,690 3,559,035 4,270,842 7,118,070 10,677,105 and 21,354,210, with no remainder.

Since 21,354,210 cannot be divided by just 1 and 21,354,210, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).