Q: Is 21,081,996 a Composite Number?

Why is 21,081,996 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 21,081,996 can be evenly divided by 1 2 3 4 6 9 12 13 18 26 36 39 52 78 107 117 156 214 234 321 421 428 468 642 842 963 1,263 1,284 1,391 1,684 1,926 2,526 2,782 3,789 3,852 4,173 5,052 5,473 5,564 7,578 8,346 10,946 12,519 15,156 16,419 16,692 21,892 25,038 32,838 45,047 49,257 50,076 65,676 90,094 98,514 135,141 180,188 197,028 270,282 405,423 540,564 585,611 810,846 1,171,222 1,621,692 1,756,833 2,342,444 3,513,666 5,270,499 7,027,332 10,540,998 and 21,081,996, with no remainder.

Since 21,081,996 cannot be divided by just 1 and 21,081,996, 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).