Q: Is 20,743,128 a Composite Number?

Why is 20,743,128 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 20,743,128 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 17 18 21 24 27 28 34 36 42 51 54 56 63 68 72 81 84 102 108 119 126 136 153 162 168 189 204 216 238 252 269 306 324 357 378 408 459 476 504 538 567 612 648 714 756 807 918 952 1,071 1,076 1,134 1,224 1,377 1,428 1,512 1,614 1,836 1,883 2,142 2,152 2,268 2,421 2,754 2,856 3,213 3,228 3,672 3,766 4,284 4,536 4,573 4,842 5,508 5,649 6,426 6,456 7,263 7,532 8,568 9,146 9,639 9,684 11,016 11,298 12,852 13,719 14,526 15,064 16,947 18,292 19,278 19,368 21,789 22,596 25,704 27,438 29,052 32,011 33,894 36,584 38,556 41,157 43,578 45,192 50,841 54,876 58,104 64,022 67,788 77,112 82,314 87,156 96,033 101,682 109,752 123,471 128,044 135,576 152,523 164,628 174,312 192,066 203,364 246,942 256,088 288,099 305,046 329,256 370,413 384,132 406,728 493,884 576,198 610,092 740,826 768,264 864,297 987,768 1,152,396 1,220,184 1,481,652 1,728,594 2,304,792 2,592,891 2,963,304 3,457,188 5,185,782 6,914,376 10,371,564 and 20,743,128, with no remainder.

Since 20,743,128 cannot be divided by just 1 and 20,743,128, 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).