21087831492

Names of 21087831492

• Cardinal: 21087831492 can be written as Twenty-one billion, eighty-seven million, eight hundred thirty-one thousand, four hundred ninety-two.

Scientific notation

• Scientific notation: 2.1087831492 × 10¹⁰

Factors of 21087831492

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 134

Divisors of 21087831492

• Number of divisors d(n): 864
• Complete list of divisors:
  1 2 3 4 6 7 9 12 13 14 17 18 19 21 26 27 28 34 36 38 39 42 49 51 52 54 57 63 68 73 76 78 84 91 98 102 108 114 117 119 126 133 146 147 153 156 169 171 182 189 196 204 219 221 228 234 238 247 252 266 273 292 294 306 323 338 342 351 357 364 378 399 438 441 442 459 468 476 494 507 511 513 532 546 588 612 637 646 657 663 676 684 702 714 741 756 798 819 833 876 882 884 918 931 949 969 988 1014 1022 1026 1071 1092 1183 1197 1241 1274 1292 1314 1323 1326 1387 1404 1428 1482 1521 1533 1547 1596 1638 1666 1729 1764 1836 1862 1898 1911 1938 1971 1989 2028 2044 2052 2142 2223 2261 2366 2394 2457 2482 2499 2548 2628 2646 2652 2774 2793 2847 2873 2907 2964 3042 3066 3094 3211 3213 3276 3332 3458 3549 3577 3591 3723 3724 3796 3822 3876 3942 3978 4161 4199 4284 4446 4522 4563 4599 4641 4732 4788 4914 4964 4998 5187 5292 5548 5586 5694 5733 5746 5814 5967 6084 6132 6188 6422 6426 6643 6669 6783 6916 7098 7154 7182 7446 7497 7644 7884 7956 8281 8322 8379 8398 8541 8619 8687 8721 8892 9044 9126 9198 9282 9633 9709 9828 9996 10374 10647 10731 10829 11169 11172 11388 11466 11492 11628 11934 12103 12337 12483 12597 12844 12852 13286 13338 13566 13797 13923 14196 14308 14364 14892 14994 15561 15827 16133 16562 16644 16758 16796 17082 17199 17238 17374 17442 18031 18252 18396 18564 19266 19418 19929 20111 20349 20748 21294 21462 21658 22338 22477 22491 22932 23579 23868 24206 24674 24843 24966 25137 25194 25623 25857 26061 26572 26676 27132 27594 27846 28899 29127 29393 29988 31122 31654 31941 32193 32266 32487 33124 33507 33516 34164 34398 34476 34748 34884 36062 36309 37011 37449 37791 38532 38836 39858 40222 40698 41769 42588 42924 43316 44676 44954 44982 46501 46683 47158 47481 48399 48412 49348 49686 49932 50274 50388 51246 51714 52122 54093 54587 55188 55692 57798 58254 58786 59787 60333 60809 61047 62244 63308 63882 64386 64532 64974 67014 67431 67963 68796 70737 72124 72618 74022 74529 74898 75582 77571 78183 79716 80444 81396 83538 86359 86697 87381 88179 89908 89964 93002 93366 94316 94962 96579 96798 97461 99372 100548 102492 103428 104244 108186 108927 109174 111033 112931 113373 115596 116508 117572 119574 120666 121618 122094 126217 127764 128772 129948 134028 134862 135926 139503 140777 141474 142443 145197 145236 148044 149058 149796 151164 155142 156366 157339 162279 163761 165053 167076 172718 173394 174762 176358 179361 180999 182427 186004 186732 189924 193158 193596 194922 202293 203889 205751 209729 212211 216372 217854 218348 222066 223587 225862 226746 234403 234549 239148 241332 243236 244188 252434 259077 262143 264537 269724 271852 279006 281554 282948 284886 290394 292383 298116 306527 310284 312732 314678 324558 326781 327522 330106 333099 338793 345436 346788 349524 352716 358722 361998 364854 378651 382109 386316 389844 404586 407778 411502 418509 419458 422331 424422 427329 435591 435708 444132 447174 451724 453492 468806 469098 472017 486837 491283 495159 504868 518154 524286 529074 542997 547281 558012 563108 569772 580788 584766 604513 606879 611667 613054 617253 629187 629356 636633 649116 653562 655044 660212 666198 677586 703209 717444 723996 729708 757302 764218 777231 790517 793611 809172 815556 823004 837018 838916 844662 848844 854658 871182 883519 894348 919581 937612 938196 944034 973674 982566 990318 1016379 1036308 1048572 1058148 1085994 1094562 1135953 1146327 1155371 1169532 1209026 1213758 1223334 1226108 1234506 1255527 1258374 1266993 1273266 1307124 1332396 1355172 1406418 1416051 1468103 1473849 1485477 1514604 1528436 1554462 1581034 1587222 1640821 1641843 1674036 1689324 1709316 1742364 1767038 1813539 1835001 1839162 1851759 1887561 1888068 1947348 1965132 1980636 2032758 2109627 2145689 2171988 2189124 2271906 2292654 2310742 2331693 2371551 2418052 2427516 2446668 2469012 2511054 2516748 2533986 2546532 2650557 2674763 2758743 2812836 2832102 2936206 2947698 2970954 3049137 3108924 3162068 3174444 3281642 3283686 3407859 3438981 3466113 3534076 3627078 3670002 3678324 3703518 3775122 3800979 3984851 4065516 4219254 4248153 4291378 4404309 4456431 4543812 4585308 4621484 4663386 4743102 4922463 5022108 5067972 5301114 5349526 5440617 5517486 5555277 5662683 5664204 5872412 5895396 5941908 6098274 6328881 6437067 6563284 6567372 6815718 6877962 6932226 7114653 7254156 7340004 7407036 7550244 7601958 7951671 7969702 8024289 8276229 8438508 8496306 8582756 8808618 8912862 9326772 9486204 9844926 10276721 10316943 10398339 10602228 10699052 10881234 11034972 11110554 11325366 11485747 11954553 12196548 12657762 12874134 13212927 13631436 13755924 13864452 14229306 14767389 15019823 15203916 15903342 15939404 16048578 16321851 16552458 16992612 17617236 17825724 19311201 19689852 20553442 20633886 20796678 21343959 21762468 22221108 22650732 22971494 23855013 23909106 24072867 25315524 25748268 26425854 27893957 28458612 29534778 30039646 30830163 31195017 31806684 32097156 32643702 33104916 34457241 35863659 38622402 39638781 41106884 41267772 41593356 42687918 44302167 45059469 45942988 47710026 47818212 48145734 52851708 55787914 57933603 59069556 60079292 61660326 62390034 65287404 68914482 71727318 72218601 77244804 79277562 83681871 85375836 88604334 90118938 92490489 95420052 96291468 103371723 107590977 111575828 115867206 123320652 124780068 135178407 137828964 143454636 144437202 158555124 167363742 177208668 180237876 184980978 195257699 206743446 215181954 231734412 251045613 270356814 277471467 288874404 310115169 334727484 369961956 390515398 405535221 413486892 430363908 502091226 540713628 554942934 585773097 620230338 753136839 781030796 811070442 1004182452 1109885868 1171546194 1240460676 1506273678 1622140884 1757319291 2343092388 3012547356 3514638582 5271957873 7029277164 10543915746 21087831492
• Sum of all divisors σ(n): 77806915200
• Sum of proper divisors (its aliquot sum) s(n): 56719083708
• 21087831492 is an abundant number, because the sum of its proper divisors (56719083708) is greater than itself. Its abundance is 35631252216

Bases of 21087831492

• Binary: 10011101000111011101100010111000100₂
• Hexadecimal: 0x4E8EEC5C4
• Base-36: 9OR5EX0

Squares and roots of 21087831492

• 21087831492 squared (21087831492²) is 444696637034986946064
• 21087831492 cubed (21087831492³) is 9377687746852891227017324647488
• The square root of 21087831492 is 145216.4986907479
• The cube root of 21087831492 is 2762.7651823865

Scales and comparisons

• 21,087,831,492 seconds is equal to 670 years, 27 weeks, 3 days, 2 hours, 58 minutes, 12 seconds.
• To count from 1 to 21,087,831,492 would take you about one thousand, three hundred forty-one 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 21087831492 cubic inches would be around 230.2 feet tall.

Recreational maths with 21087831492

• 21087831492 backwards is 29413878012
• The number of decimal digits it has is: 11
• The sum of 21087831492's digits is 45
• More coming soon!