Q: Is 21,775,404 a Composite Number?

Why is 21,775,404 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 21,775,404 can be evenly divided by 1 2 3 4 6 7 12 14 21 28 29 42 49 58 84 87 98 116 147 174 196 203 294 348 406 588 609 812 1,218 1,277 1,421 2,436 2,554 2,842 3,831 4,263 5,108 5,684 7,662 8,526 8,939 15,324 17,052 17,878 26,817 35,756 37,033 53,634 62,573 74,066 107,268 111,099 125,146 148,132 187,719 222,198 250,292 259,231 375,438 444,396 518,462 750,876 777,693 1,036,924 1,555,386 1,814,617 3,110,772 3,629,234 5,443,851 7,258,468 10,887,702 and 21,775,404, with no remainder.

Since 21,775,404 cannot be divided by just 1 and 21,775,404, 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).