21664393920

Names of 21664393920

• Cardinal: 21664393920 can be written as Twenty-one billion, six hundred sixty-four million, three hundred ninety-three thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.166439392 × 10¹⁰

Factors of 21664393920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 461

Divisors of 21664393920

• Number of divisors d(n): 672
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 32 36 37 39 40 45 48 52 54 60 64 65 72 74 78 80 90 96 104 108 111 117 120 130 135 144 148 156 160 169 180 185 192 195 208 216 222 234 240 260 270 288 296 312 320 333 338 351 360 370 390 401 416 432 444 468 480 481 507 520 540 555 576 585 592 624 666 676 702 720 740 780 802 832 845 864 888 936 960 962 999 1014 1040 1080 1110 1170 1184 1203 1248 1332 1352 1404 1440 1443 1480 1521 1560 1604 1665 1690 1728 1755 1776 1872 1924 1998 2005 2028 2080 2160 2220 2340 2368 2405 2406 2496 2535 2664 2704 2808 2880 2886 2960 3042 3120 3208 3330 3380 3510 3552 3609 3744 3848 3996 4010 4056 4160 4320 4329 4440 4563 4680 4810 4812 4995 5070 5213 5328 5408 5616 5772 5920 6015 6084 6240 6253 6416 6660 6760 7020 7104 7215 7218 7488 7605 7696 7992 8020 8112 8640 8658 8880 9126 9360 9620 9624 9990 10140 10426 10656 10816 10827 11232 11544 11840 12030 12168 12480 12506 12832 12987 13320 13520 14040 14430 14436 14837 15210 15392 15639 15984 16040 16224 17316 17760 18045 18252 18720 18759 19240 19248 19980 20280 20852 21312 21645 21654 22464 22815 23088 24060 24336 25012 25664 25974 26065 26640 27040 28080 28860 28872 29674 30420 30784 31265 31278 31968 32080 32448 34632 35520 36090 36504 37440 37518 38480 38496 39960 40560 41704 43290 43308 44511 45630 46176 46917 48120 48672 50024 51948 52130 53280 54080 54135 56160 56277 57720 57744 59348 60840 62530 62556 63936 64160 64935 67769 69264 72180 73008 74185 75036 76960 76992 78195 79920 81120 83408 86580 86616 89022 91260 92352 93795 93834 96240 97344 100048 103896 104260 106560 108270 112320 112554 115440 115488 118696 121680 125060 125112 128320 129870 133533 135538 138528 140751 144360 146016 148370 150072 153920 156390 159840 162240 166816 168831 173160 173232 178044 182520 187590 187668 192480 192881 200096 203307 207792 208520 216540 222555 225108 230880 230976 234585 237392 243360 250120 250224 259740 267066 271076 277056 281385 281502 288720 292032 296740 300144 312780 319680 333632 337662 338845 346320 346464 356088 365040 375180 375336 384960 385762 400192 400599 406614 415584 417040 433080 445110 450216 461760 469170 474784 486720 500240 500448 519480 534132 542152 562770 563004 577440 578643 593480 600288 609921 625560 667665 675324 677690 692640 692928 703755 712176 730080 750360 750672 771524 801198 813228 831168 834080 844155 866160 890220 900432 938340 949568 964405 1000480 1000896 1016535 1038960 1068264 1084304 1125540 1126008 1154880 1157286 1186960 1200576 1219842 1251120 1335330 1350648 1355380 1385280 1407510 1424352 1460160 1500720 1501344 1543048 1602396 1626456 1668160 1688310 1732320 1735929 1780440 1800864 1829763 1876680 1928810 2000960 2002995 2033070 2077920 2136528 2168608 2251080 2252016 2314572 2373920 2439684 2502240 2507453 2670660 2701296 2710760 2815020 2848704 2893215 3001440 3002688 3049605 3086096 3204792 3252912 3376620 3464640 3471858 3560880 3601728 3659526 3753360 3857620 4005990 4066140 4155840 4273056 4337216 4502160 4504032 4629144 4747840 4879368 5004480 5014906 5207787 5341320 5402592 5421520 5630040 5786430 6002880 6099210 6172192 6409584 6505824 6753240 6943716 7121760 7319052 7506720 7522359 7715240 8011980 8132280 8546112 8679645 9004320 9008064 9148815 9258288 9758736 10029812 10415574 10682640 10805184 10843040 11260080 11572860 12198420 12344384 12537265 12819168 13011648 13506480 13887432 14243520 14638104 15013440 15044718 15430480 16023960 16264560 17359290 18008640 18297630 18516576 19517472 20059624 20831148 21365280 21686080 22520160 22567077 23145720 24396840 25074530 25638336 26038935 27012960 27774864 29276208 30089436 30860960 32047920 32529120 34718580 36595260 37033152 37611795 39034944 40119248 41662296 42730560 45040320 45134154 46291440 48793680 50149060 52077870 54025920 55549728 58552416 60178872 61721920 64095840 65058240 67701231 69437160 73190520 75223590 80238496 83324592 90268308 92582880 97587360 100298120 104155740 111099456 112835385 117104832 120357744 128191680 135402462 138874320 146381040 150447180 160476992 166649184 180536616 185165760 195174720 200596240 208311480 225670770 240715488 270804924 277748640 292762080 300894360 333298368 338506155 361073232 401192480 416622960 451341540 481430976 541609848 555497280 585524160 601788720 677012310 722146464 802384960 833245920 902683080 1083219696 1203577440 1354024620 1444292928 1666491840 1805366160 2166439392 2407154880 2708049240 3610732320 4332878784 5416098480 7221464640 10832196960 21664393920
• Sum of all divisors σ(n): 85207083840
• Sum of proper divisors (its aliquot sum) s(n): 63542689920
• 21664393920 is an abundant number, because the sum of its proper divisors (63542689920) is greater than itself. Its abundance is 41878296000

Bases of 21664393920

• Binary: 10100001011010011000110101011000000₂
• Hexadecimal: 0x50B4C6AC0
• Base-36: 9YAF5C0

Squares and roots of 21664393920

• 21664393920 squared (21664393920²) is 469345963920932966400
• 21664393920 cubed (21664393920³) is 10168095847145199518003724288000
• The square root of 21664393920 is 147188.2940997685
• The cube root of 21664393920 is 2787.7180554817

Scales and comparisons

• 21,664,393,920 seconds is equal to 688 years, 44 weeks, 5 days, 7 hours, 12 minutes.
• To count from 1 to 21,664,393,920 would take you about one thousand, three hundred seventy-seven 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 21664393920 cubic inches would be around 232.3 feet tall.

Recreational maths with 21664393920

• 21664393920 backwards is 02939346612
• 21664393920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21664393920's digits is 45
• More coming soon!