21680688720

Names of 21680688720

• Cardinal: 21680688720 can be written as Twenty-one billion, six hundred eighty million, six hundred eighty-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.168068872 × 10¹⁰

Factors of 21680688720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 240

Divisors of 21680688720

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 19 20 23 24 30 37 38 40 46 48 57 60 69 74 76 80 92 95 111 114 115 120 138 148 151 152 184 185 190 222 228 230 240 276 285 296 302 304 345 368 370 380 437 444 453 456 460 552 555 570 592 604 690 703 740 755 760 851 874 888 906 912 920 1104 1110 1140 1208 1311 1369 1380 1406 1480 1510 1520 1702 1748 1776 1812 1840 2109 2185 2220 2265 2280 2416 2553 2622 2738 2760 2812 2869 2960 3020 3404 3473 3496 3515 3624 4107 4218 4255 4370 4440 4530 4560 5106 5244 5476 5520 5587 5624 5738 6040 6555 6808 6845 6946 6992 7030 7248 8214 8436 8510 8607 8740 8880 9060 10212 10419 10488 10545 10952 11174 11248 11476 12080 12765 13110 13616 13690 13892 14060 14345 16169 16428 16761 16872 17020 17214 17365 17480 18120 20424 20535 20838 20976 21090 21904 22348 22952 25530 26011 26220 27380 27784 27935 28120 28690 31487 32338 32856 33522 33744 34040 34428 34730 34960 36240 40848 41070 41676 42180 43035 44696 45904 48507 51060 52022 52095 52440 54760 55568 55870 56240 57380 62974 64676 65712 65987 67044 68080 68856 69460 78033 80845 82140 83352 83805 84360 86070 89392 94461 97014 102120 104044 104190 104880 106153 109520 111740 114760 125948 128501 129352 130055 131974 134088 137712 138920 156066 157435 161690 164280 166704 167610 168720 172140 188922 194028 197961 204240 206719 208088 208380 212306 223480 229520 242535 251896 257002 258704 260110 263948 268176 277840 312132 314870 318459 323380 328560 329935 335220 344280 377844 385503 388056 390165 395922 413438 416176 416760 424612 446960 472305 485070 503792 514004 520220 527896 530765 598253 620157 624264 629740 636918 642505 646760 659870 670440 688560 755688 771006 776112 780330 791844 826876 833520 849224 944610 970140 989805 1028008 1033595 1040440 1055792 1061530 1196506 1240314 1248528 1259480 1273836 1285010 1293520 1319740 1340880 1511376 1542012 1560660 1583688 1592295 1653752 1698448 1794759 1889220 1927515 1940280 1979610 2056016 2067190 2080880 2123060 2393012 2441519 2480628 2518960 2547672 2570020 2639480 2991265 3084024 3100785 3121320 3167376 3184590 3307504 3589518 3778440 3855030 3880560 3927661 3959220 4134380 4246120 4754537 4786024 4883038 4961256 5095344 5140040 5278960 5982530 6168048 6201570 6242640 6369180 7179036 7324557 7556880 7710060 7855322 7918440 8268760 8492240 8973795 9509074 9572048 9766076 9922512 10280080 11782983 11965060 12207595 12403140 12738360 14263611 14358072 14649114 15420120 15710644 15836880 16537520 17947590 19018148 19532152 19638305 23565966 23772685 23930120 24415190 24806280 25476720 28527222 28716144 29298228 30840240 31421288 35895180 36622785 38036296 39064304 39276610 47131932 47545370 47860240 48830380 49612560 57054444 58596456 58914915 62842576 71318055 71790360 73245570 76072592 78553220 90336203 94263864 95090740 97660760 114108888 117192912 117829830 142636110 143580720 146491140 157106440 180672406 188527728 190181480 195321520 228217776 235659660 271008609 285272220 292982280 314212880 361344812 380362960 451681015 471319320 542017218 570544440 585964560 722689624 903362030 942638640 1084034436 1141088880 1355043045 1445379248 1806724060 2168068872 2710086090 3613448120 4336137744 5420172180 7226896240 10840344360 21680688720
• Sum of all divisors σ(n): 76375111680
• Sum of proper divisors (its aliquot sum) s(n): 54694422960
• 21680688720 is an abundant number, because the sum of its proper divisors (54694422960) is greater than itself. Its abundance is 33013734240

Bases of 21680688720

• Binary: 10100001100010001010000111001010000₂
• Hexadecimal: 0x50C450E50
• Base-36: 9YK4EHC

Squares and roots of 21680688720

• 21680688720 squared (21680688720²) is 470052263373535238400
• 21680688720 cubed (21680688720³) is 10191056804333074589701390848000
• The square root of 21680688720 is 147243.6372818875
• The cube root of 21680688720 is 2788.4168045331

Scales and comparisons

• 21,680,688,720 seconds is equal to 689 years, 19 weeks, 4 days, 21 hours, 32 minutes.
• To count from 1 to 21,680,688,720 would take you about one thousand, three hundred seventy-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 21680688720 cubic inches would be around 232.4 feet tall.

Recreational maths with 21680688720

• 21680688720 backwards is 02788608612
• 21680688720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21680688720's digits is 48
• More coming soon!