Q: Is 21,085,020 a Composite Number?

Why is 21,085,020 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 21,085,020 can be evenly divided by 1 2 3 4 5 6 9 10 11 12 15 18 20 22 23 30 33 36 44 45 46 55 60 66 69 90 92 99 110 115 132 138 165 180 198 207 220 230 253 276 330 345 396 414 460 463 495 506 660 690 759 828 926 990 1,012 1,035 1,265 1,380 1,389 1,518 1,852 1,980 2,070 2,277 2,315 2,530 2,778 3,036 3,795 4,140 4,167 4,554 4,630 5,060 5,093 5,556 6,945 7,590 8,334 9,108 9,260 10,186 10,649 11,385 13,890 15,180 15,279 16,668 20,372 20,835 21,298 22,770 25,465 27,780 30,558 31,947 41,670 42,596 45,540 45,837 50,930 53,245 61,116 63,894 76,395 83,340 91,674 95,841 101,860 106,490 117,139 127,788 152,790 159,735 183,348 191,682 212,980 229,185 234,278 305,580 319,470 351,417 383,364 458,370 468,556 479,205 585,695 638,940 702,834 916,740 958,410 1,054,251 1,171,390 1,405,668 1,757,085 1,916,820 2,108,502 2,342,780 3,514,170 4,217,004 5,271,255 7,028,340 10,542,510 and 21,085,020, with no remainder.

Since 21,085,020 cannot be divided by just 1 and 21,085,020, 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).