Q: Is 21,642,390 a Composite Number?

Why is 21,642,390 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 21,642,390 can be evenly divided by 1 2 3 5 6 7 9 10 11 14 15 18 21 22 27 30 33 35 42 45 54 55 63 66 70 77 81 90 99 105 110 126 135 154 162 165 189 198 210 231 270 297 315 330 347 378 385 405 462 495 567 594 630 693 694 770 810 891 945 990 1,041 1,134 1,155 1,386 1,485 1,735 1,782 1,890 2,079 2,082 2,310 2,429 2,835 2,970 3,123 3,465 3,470 3,817 4,158 4,455 4,858 5,205 5,670 6,237 6,246 6,930 7,287 7,634 8,910 9,369 10,395 10,410 11,451 12,145 12,474 14,574 15,615 18,738 19,085 20,790 21,861 22,902 24,290 26,719 28,107 31,185 31,230 34,353 36,435 38,170 43,722 46,845 53,438 56,214 57,255 62,370 65,583 68,706 72,870 80,157 93,690 103,059 109,305 114,510 131,166 133,595 140,535 160,314 171,765 196,749 206,118 218,610 240,471 267,190 281,070 309,177 327,915 343,530 393,498 400,785 480,942 515,295 618,354 655,830 721,413 801,570 983,745 1,030,590 1,202,355 1,442,826 1,545,885 1,967,490 2,164,239 2,404,710 3,091,770 3,607,065 4,328,478 7,214,130 10,821,195 and 21,642,390, with no remainder.

Since 21,642,390 cannot be divided by just 1 and 21,642,390, 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).