Q: Is 21,212,604 a Composite Number?

Why is 21,212,604 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 21,212,604 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 27 28 36 42 47 54 63 81 84 94 108 126 141 162 188 189 199 252 282 324 329 378 398 423 564 567 597 658 756 796 846 987 1,134 1,194 1,269 1,316 1,393 1,692 1,791 1,974 2,268 2,388 2,538 2,786 2,961 3,582 3,807 3,948 4,179 5,076 5,373 5,572 5,922 7,164 7,614 8,358 8,883 9,353 10,746 11,844 12,537 15,228 16,119 16,716 17,766 18,706 21,492 25,074 26,649 28,059 32,238 35,532 37,412 37,611 50,148 53,298 56,118 64,476 65,471 75,222 84,177 106,596 112,236 112,833 130,942 150,444 168,354 196,413 225,666 252,531 261,884 336,708 392,826 451,332 505,062 589,239 757,593 785,652 1,010,124 1,178,478 1,515,186 1,767,717 2,356,956 3,030,372 3,535,434 5,303,151 7,070,868 10,606,302 and 21,212,604, with no remainder.

Since 21,212,604 cannot be divided by just 1 and 21,212,604, 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).