21205413408

Names of 21205413408

• Cardinal: 21205413408 can be written as Twenty-one billion, two hundred five million, four hundred thirteen thousand, four hundred eight.

Scientific notation

• Scientific notation: 2.1205413408 × 10¹⁰

Factors of 21205413408

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 207

Divisors of 21205413408

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 8 12 16 23 24 29 32 46 48 58 61 69 87 89 92 96 116 122 138 174 178 183 184 232 244 267 276 348 356 366 368 464 488 534 552 667 696 712 732 736 928 976 1068 1104 1334 1392 1403 1424 1464 1769 1952 2001 2047 2136 2208 2581 2668 2784 2806 2848 2928 3538 3721 4002 4094 4209 4272 5162 5307 5336 5429 5612 5856 6141 7076 7442 7743 8004 8188 8418 8544 10324 10614 10672 10858 11163 11224 12282 14152 14884 15486 16008 16287 16376 16836 20648 21228 21344 21716 22326 22448 24564 28304 29768 30972 32016 32574 32752 33672 40687 41296 42456 43432 44652 44896 49128 56608 59363 59536 61944 64032 65148 65504 67344 81374 82592 84912 85583 86864 89304 98256 107909 118726 119072 122061 123888 124867 130296 134688 157441 162748 169824 171166 173728 178089 178608 196512 215818 237452 244122 247776 249734 256749 260592 314882 323727 325496 331169 342332 356178 357216 374601 431636 472323 474904 488244 499468 513498 521184 629764 647454 650992 662338 684664 712356 749202 863272 944646 949808 976488 993507 998936 1026996 1259528 1294908 1301984 1324676 1369328 1424712 1498404 1726544 1889292 1899616 1952976 1987014 1997872 2053992 2481907 2519056 2589816 2649352 2738656 2849424 2996808 3453088 3621143 3778584 3905952 3974028 3995744 4107984 4963814 5038112 5179632 5298704 5698848 5993616 7242286 7445721 7557168 7616887 7948056 8215968 9603901 9927628 10359264 10597408 10863429 11987232 14484572 14891442 15114336 15233774 15896112 19207802 19855256 21726858 22850661 28811703 28969144 29782884 30467548 31792224 38415604 39710512 43453716 45701322 57623406 57938288 59565768 60935096 76831208 79421024 86907432 91402644 115246812 115876576 119131536 121870192 153662416 173814864 182805288 220889723 230493624 238263072 243740384 307324832 347629728 365610576 441779446 460987248 662669169 731221152 883558892 921974496 1325338338 1767117784 2650676676 3534235568 5301353352 7068471136 10602706704 21205413408
• Sum of all divisors σ(n): 61774876800
• Sum of proper divisors (its aliquot sum) s(n): 40569463392
• 21205413408 is an abundant number, because the sum of its proper divisors (40569463392) is greater than itself. Its abundance is 19364049984

Bases of 21205413408

• Binary: 10011101111111100001110111000100000₂
• Hexadecimal: 0x4EFF0EE20
• Base-36: 9QP5LPC

Squares and roots of 21205413408

• 21205413408 squared (21205413408²) is 449669557804186174464
• 21205413408 cubed (21205413408³) is 9535428870230320542507132813312
• The square root of 21205413408 is 145620.7863184373
• The cube root of 21205413408 is 2767.8905602871

Scales and comparisons

• 21,205,413,408 seconds is equal to 674 years, 13 weeks, 6 days, 36 minutes, 48 seconds.
• To count from 1 to 21,205,413,408 would take you about one thousand, three hundred forty-eight years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21205413408 cubic inches would be around 230.7 feet tall.

Recreational maths with 21205413408

• 21205413408 backwards is 80431450212
• The number of decimal digits it has is: 11
• The sum of 21205413408's digits is 30
• More coming soon!