21018003720

Names of 21018003720

• Cardinal: 21018003720 can be written as Twenty-one billion, eighteen million, three thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.101800372 × 10¹⁰

Factors of 21018003720

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 745

Divisors of 21018003720

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 17 20 21 24 28 30 31 34 35 40 42 51 56 60 62 68 70 79 84 85 93 102 105 119 120 124 136 140 155 158 168 170 186 204 210 217 237 238 248 255 280 310 316 340 357 372 395 408 420 434 465 474 476 510 527 553 595 601 620 632 651 680 714 744 790 840 868 930 948 952 1020 1054 1085 1106 1185 1190 1202 1240 1302 1343 1428 1580 1581 1659 1736 1785 1803 1860 1896 2040 2108 2170 2212 2370 2380 2404 2449 2604 2635 2686 2765 2856 3005 3160 3162 3255 3318 3570 3606 3689 3720 4029 4207 4216 4340 4424 4740 4760 4808 4898 5208 5270 5372 5530 6010 6324 6510 6636 6715 7140 7212 7347 7378 7905 8058 8295 8414 8680 9015 9401 9480 9796 10217 10540 10744 11060 11067 12020 12245 12621 12648 13020 13272 13430 14280 14424 14694 14756 15810 16116 16590 16828 17143 18030 18445 18631 18802 19592 20145 20434 21035 21080 22120 22134 24040 24490 25242 26040 26860 28203 29388 29512 30651 31620 32232 33180 33656 34286 36060 36735 36890 37262 37604 40290 40868 41633 42070 44268 47005 47479 48980 50484 51085 51429 53720 55335 55893 56406 58776 61302 63105 63240 66360 68572 71519 72120 73470 73780 74524 75208 80580 81736 83266 84140 85715 88536 93155 94010 94958 97960 100968 102170 102858 110670 111786 112812 122604 124899 126210 130417 137144 141015 142437 143038 146940 147560 149048 153255 161160 166532 168280 171430 186310 188020 189916 204340 205716 208165 214557 221340 223572 225624 237395 245208 249798 252420 257145 260834 279465 282030 284874 286076 291431 293880 306510 316727 332353 333064 342860 357595 372620 376040 379832 391251 408680 411432 416330 429114 442680 447144 474790 499596 504840 514290 521668 558930 564060 569748 572152 582862 613020 624495 633454 652085 664706 685720 712185 715190 745240 782502 807143 832660 858228 874293 949580 950181 997059 999192 1028580 1043336 1072785 1117860 1128120 1139496 1165724 1226040 1248990 1266908 1304170 1329412 1424370 1430380 1457155 1471849 1565004 1583635 1614286 1661765 1665320 1716456 1748586 1899160 1900362 1956255 1994118 2057160 2145570 2217089 2235720 2331448 2421429 2497980 2533816 2608340 2658824 2848740 2860760 2914310 2943698 3130008 3167270 3228572 3323530 3497172 3800724 3912510 3988236 4035715 4291140 4371465 4415547 4434178 4750905 4842858 4985295 4995960 5216680 5650001 5697480 5828620 5887396 6334540 6457144 6647060 6651267 6994344 7359245 7601448 7825020 7976472 8071430 8582280 8742930 8831094 8868356 9501810 9685716 9970590 10302943 11085445 11300002 11657240 11774792 12107145 12669080 13294120 13302534 14718490 15650040 16142860 16950003 17485860 17662188 17736712 19003620 19371432 19941180 20605886 22077735 22170890 22600004 24214290 25021433 26605068 28250005 29436980 30908829 32285720 33256335 33900006 34971720 35324376 38007240 39882360 41211772 44155470 44341780 45200008 48428580 50042866 51514715 53210136 56500010 58873960 61817658 66512670 67800012 75064299 82423544 84750015 88310940 88683560 96857160 100085732 103029430 113000020 123635316 125107165 133025340 135600024 150128598 154544145 169500030 175150031 176621880 200171464 206058860 226000040 247270632 250214330 266050680 300257196 309088290 339000060 350300062 375321495 412117720 500428660 525450093 600514392 618176580 678000120 700600124 750642990 875750155 1000857320 1050900186 1236353160 1401200248 1501285980 1751500310 2101800372 2627250465 3002571960 3503000620 4203600744 5254500930 7006001240 10509001860 21018003720
• Sum of all divisors σ(n): 79891660800
• Sum of proper divisors (its aliquot sum) s(n): 58873657080
• 21018003720 is an abundant number, because the sum of its proper divisors (58873657080) is greater than itself. Its abundance is 37855653360

Bases of 21018003720

• Binary: 10011100100110001010100100100001000₂
• Hexadecimal: 0x4E4C54908
• Base-36: 9NLKRGO

Squares and roots of 21018003720

• 21018003720 squared (21018003720²) is 441756480373933838400
• 21018003720 cubed (21018003720³) is 9284839347833448406525078848000
• The square root of 21018003720 is 144975.8728892499
• The cube root of 21018003720 is 2759.7123781353

Scales and comparisons

• 21,018,003,720 seconds is equal to 668 years, 15 weeks, 6 days, 22 hours, 22 minutes.
• To count from 1 to 21,018,003,720 would take you about one thousand, three hundred thirty-six 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 21018003720 cubic inches would be around 230 feet tall.

Recreational maths with 21018003720

• 21018003720 backwards is 02730081012
• 21018003720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21018003720's digits is 24
• More coming soon!