18919872972

Names of 18919872972

• Cardinal: 18919872972 can be written as Eighteen billion, nine hundred nineteen million, eight hundred seventy-two thousand, nine hundred seventy-two.

Scientific notation

• Scientific notation: 1.8919872972 × 10¹⁰

Factors of 18919872972

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 267

Divisors of 18919872972

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 6 7 9 11 12 13 14 18 19 21 22 26 27 28 33 36 38 39 42 44 52 54 57 61 63 66 76 77 78 84 91 99 108 114 117 122 126 132 133 143 151 154 156 171 182 183 189 198 209 228 231 234 244 247 252 266 273 286 297 302 308 342 351 364 366 378 396 399 418 427 429 453 462 468 494 513 532 546 549 572 594 604 627 671 684 693 702 732 741 756 793 798 819 836 854 858 906 924 988 1001 1026 1057 1092 1098 1159 1188 1197 1254 1281 1287 1342 1359 1386 1404 1463 1482 1586 1596 1638 1647 1661 1708 1716 1729 1812 1881 1963 2002 2013 2052 2079 2114 2196 2223 2318 2379 2394 2457 2508 2562 2574 2684 2717 2718 2772 2869 2926 2964 3003 3171 3172 3276 3294 3322 3458 3477 3591 3762 3843 3861 3926 4004 4026 4077 4158 4228 4389 4446 4636 4697 4758 4788 4914 4983 5124 5148 5187 5434 5436 5551 5643 5738 5852 5889 6006 6039 6342 6588 6644 6669 6916 6954 7137 7182 7524 7686 7722 7852 8052 8113 8151 8154 8316 8607 8723 8778 8892 9009 9211 9394 9513 9516 9828 9966 10374 10431 10868 11102 11286 11476 11529 11627 11778 12012 12078 12684 12749 13167 13338 13741 13908 14091 14274 14364 14949 15067 15372 15444 15561 16226 16302 16308 16653 17214 17446 17556 17667 18018 18117 18422 18788 19019 19026 19932 20083 20748 20862 21411 21593 22204 22572 23058 23254 23556 24156 24339 24453 25498 25821 26169 26334 26676 27027 27482 27633 28182 28539 28548 29898 30134 31122 31293 31559 32452 32604 33306 34428 34881 34892 35334 36036 36234 36844 37297 38038 38052 38247 39501 40166 41223 41724 42273 42822 43186 44847 45201 46116 46508 46683 48678 48906 49959 50996 51642 52338 52668 53001 54054 54964 55266 56364 57057 57078 59796 60249 60268 61061 62244 62586 63118 64477 64779 66612 69762 70668 72468 73017 73359 74594 76076 76494 77463 78507 79002 80332 82446 82899 84546 85644 86372 89243 89694 90402 93366 94677 97356 97812 99918 101321 103284 104643 104676 105469 106002 108108 110532 111891 114114 114156 114741 119743 120498 122122 123669 125172 126236 126819 128954 129558 135603 139524 146034 146718 149188 149877 151151 152988 154926 157014 158004 164892 165737 165798 169092 171171 175009 178486 179388 180747 180804 183183 186732 189354 193431 194337 199836 202642 209286 210938 212004 219051 220913 223782 228228 229482 235521 239486 240996 244244 247338 248697 253638 257908 259116 261079 267729 271206 284031 292068 293436 299754 302302 303963 309852 313929 314028 316407 331474 331596 335673 342342 344223 350018 356972 359229 361494 366366 371007 378708 386862 388674 405284 406809 410267 418572 421876 438102 441826 447564 453453 458964 471042 478972 494676 497211 497394 507276 513513 522158 525027 535458 542241 542412 549549 568062 580293 583011 599508 604604 607926 627858 632814 662739 662948 671346 684684 688446 700036 709247 718458 722988 732732 742014 773724 777348 783237 803187 813618 820534 838201 852093 876204 883652 906906 911889 942084 949221 994422 994788 1007019 1027026 1044316 1050054 1070916 1077687 1084482 1099098 1136124 1160159 1160586 1166022 1215852 1225063 1230801 1255716 1265628 1317173 1325478 1342692 1360359 1376892 1418494 1436916 1484028 1491633 1566474 1575081 1606374 1627236 1641068 1648647 1676402 1704186 1740879 1813812 1823778 1898442 1925099 1988217 1988844 2014038 2054052 2100108 2127741 2155374 2168964 2198196 2275117 2320318 2321172 2332044 2349711 2409561 2450126 2461602 2514603 2634346 2650956 2720718 2735667 2836988 2847663 2871869 2983266 3132948 3150162 3212748 3233061 3297294 3352804 3408372 3480477 3481758 3647556 3675189 3692403 3796884 3850198 3951519 3976434 4028076 4081077 4255482 4310748 4474899 4550234 4640636 4699422 4725243 4819122 4900252 4923204 5029206 5268692 5441436 5471334 5695326 5743738 5775297 5964651 5966532 6300324 6383223 6466122 6594588 6825351 6960954 6963516 7049133 7350378 7384806 7543809 7700396 7903038 7952868 8162154 8510964 8615607 8949798 9100468 9220211 9398844 9450486 9638244 10058412 10441431 10942668 11025567 11077209 11390652 11487476 11550594 11854557 11929302 12766446 12932244 13475693 13650702 13921908 14098266 14700756 14769612 15087618 15806076 15925819 16324308 17231214 17325891 17899596 18440422 18900972 19149669 20476053 20882862 22051134 22154418 22631427 23101188 23709114 23858604 25026287 25532892 25846821 26951386 27301404 27660633 28196532 30175236 31324293 31851638 33076701 34462428 34651782 35563671 36880844 38299338 40427079 40952106 41765724 44102268 44308836 45262854 47418228 47777457 50052574 51693642 51977673 53902772 55321266 61428159 62648586 63703276 66153402 69303564 71127342 75078861 76598676 77540463 80854158 81904212 82981899 90525708 95554914 100105148 103387284 103955346 110642532 121281237 122856318 125297172 132306804 142254684 143332371 150157722 155080926 161708316 165963798 175184009 191109828 207910692 225236583 242562474 245712636 248945697 286664742 300315444 310161852 331927596 350368018 363843711 429997113 450473166 485124948 497891394 525552027 573329484 675709749 700736036 727687422 859994226 900946332 995782788 1051104054 1351419498 1455374844 1576656081 1719988452 2102208108 2702838996 3153312162 4729968243 6306624324 9459936486 18919872972
• Sum of all divisors σ(n): 70928793600
• Sum of proper divisors (its aliquot sum) s(n): 52008920628
• 18919872972 is an abundant number, because the sum of its proper divisors (52008920628) is greater than itself. Its abundance is 33089047656

Bases of 18919872972

• Binary: 10001100111101101100101100111001100₂
• Hexadecimal: 0x467B659CC
• Base-36: 8OWEJF0

Squares and roots of 18919872972

• 18919872972 squared (18919872972²) is 357961593276616112784
• 18919872972 cubed (18919872972³) is 6772587873648306111881705274048
• The square root of 18919872972 is 137549.5291594995
• The cube root of 18919872972 is 2664.6452914933

Scales and comparisons

• 18,919,872,972 seconds is equal to 601 years, 30 weeks, 6 days, 16 minutes, 12 seconds.
• To count from 1 to 18,919,872,972 would take you about one thousand, two hundred three 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 18919872972 cubic inches would be around 222.1 feet tall.

Recreational maths with 18919872972

• 18919872972 backwards is 27927891981
• 18919872972 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18919872972's digits is 63
• More coming soon!