Q: Is 21,718,368 a Composite Number?

Why is 21,718,368 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 21,718,368 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 19 21 24 27 28 32 36 38 42 48 49 54 56 57 63 72 76 81 84 96 98 108 112 114 126 133 144 147 152 162 168 171 189 196 216 224 228 243 252 266 288 294 304 324 336 342 378 392 399 432 441 456 486 504 513 532 567 588 608 648 672 684 729 756 784 798 864 882 912 931 972 1,008 1,026 1,064 1,134 1,176 1,197 1,296 1,323 1,368 1,458 1,512 1,539 1,568 1,596 1,701 1,764 1,824 1,862 1,944 2,016 2,052 2,128 2,268 2,352 2,394 2,592 2,646 2,736 2,793 2,916 3,024 3,078 3,192 3,402 3,528 3,591 3,724 3,888 3,969 4,104 4,256 4,536 4,617 4,704 4,788 5,103 5,292 5,472 5,586 5,832 6,048 6,156 6,384 6,804 7,056 7,182 7,448 7,776 7,938 8,208 8,379 9,072 9,234 9,576 10,206 10,584 10,773 11,172 11,664 11,907 12,312 12,768 13,608 13,851 14,112 14,364 14,896 15,876 16,416 16,758 18,144 18,468 19,152 20,412 21,168 21,546 22,344 23,328 23,814 24,624 25,137 27,216 27,702 28,728 29,792 31,752 32,319 33,516 35,721 36,936 38,304 40,824 42,336 43,092 44,688 47,628 49,248 50,274 54,432 55,404 57,456 63,504 64,638 67,032 71,442 73,872 75,411 81,648 86,184 89,376 95,256 96,957 100,548 110,808 114,912 127,008 129,276 134,064 142,884 147,744 150,822 163,296 172,368 190,512 193,914 201,096 221,616 226,233 258,552 268,128 285,768 301,644 344,736 381,024 387,828 402,192 443,232 452,466 517,104 571,536 603,288 678,699 775,656 804,384 904,932 1,034,208 1,143,072 1,206,576 1,357,398 1,551,312 1,809,864 2,413,152 2,714,796 3,102,624 3,619,728 5,429,592 7,239,456 10,859,184 and 21,718,368, with no remainder.

Since 21,718,368 cannot be divided by just 1 and 21,718,368, 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).