Q: Is 21,128,008 a Composite Number?

Why is 21,128,008 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 21,128,008 can be evenly divided by 1 2 4 8 11 17 22 29 34 44 58 68 88 116 136 187 232 319 374 487 493 638 748 974 986 1,276 1,496 1,948 1,972 2,552 3,896 3,944 5,357 5,423 8,279 10,714 10,846 14,123 16,558 21,428 21,692 28,246 33,116 42,856 43,384 56,492 66,232 91,069 112,984 155,353 182,138 240,091 310,706 364,276 480,182 621,412 728,552 960,364 1,242,824 1,920,728 2,641,001 5,282,002 10,564,004 and 21,128,008, with no remainder.

Since 21,128,008 cannot be divided by just 1 and 21,128,008, 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).