Q: Is 20,642,240 a Composite Number?

Why is 20,642,240 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 20,642,240 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 251 257 320 502 514 1,004 1,028 1,255 1,285 2,008 2,056 2,510 2,570 4,016 4,112 5,020 5,140 8,032 8,224 10,040 10,280 16,064 16,448 20,080 20,560 40,160 41,120 64,507 80,320 82,240 129,014 258,028 322,535 516,056 645,070 1,032,112 1,290,140 2,064,224 2,580,280 4,128,448 5,160,560 10,321,120 and 20,642,240, with no remainder.

Since 20,642,240 cannot be divided by just 1 and 20,642,240, 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).