Q: Is 21,684,510 a Composite Number?

Why is 21,684,510 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 21,684,510 can be evenly divided by 1 2 3 5 6 9 10 15 18 19 27 30 38 45 54 57 81 90 95 114 135 162 171 190 270 285 342 405 513 570 810 855 1,026 1,409 1,539 1,710 2,565 2,818 3,078 4,227 5,130 7,045 7,695 8,454 12,681 14,090 15,390 21,135 25,362 26,771 38,043 42,270 53,542 63,405 76,086 80,313 114,129 126,810 133,855 160,626 190,215 228,258 240,939 267,710 380,430 401,565 481,878 570,645 722,817 803,130 1,141,290 1,204,695 1,445,634 2,168,451 2,409,390 3,614,085 4,336,902 7,228,170 10,842,255 and 21,684,510, with no remainder.

Since 21,684,510 cannot be divided by just 1 and 21,684,510, 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).