21391189721720

Names of 21391189721720

• Cardinal: 21391189721720 can be written as Twenty-one trillion, three hundred ninety-one billion, one hundred eighty-nine million, seven hundred twenty-one thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.139118972172 × 10¹³

Factors of 21391189721720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 422

Divisors of 21391189721720

• Number of divisors d(n): 864
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 20 26 28 31 35 40 49 52 53 56 62 65 70 91 98 104 106 124 130 140 155 182 196 212 217 245 248 260 265 280 310 311 364 371 392 403 424 434 455 490 520 530 620 622 637 689 728 742 806 868 910 961 980 1060 1085 1240 1244 1274 1378 1484 1519 1555 1612 1643 1736 1820 1855 1922 1960 2015 2120 2170 2177 2488 2548 2597 2756 2809 2821 2968 3038 3110 3185 3224 3286 3445 3640 3710 3844 4030 4043 4340 4354 4805 4823 5096 5194 5512 5618 5642 6076 6220 6370 6572 6727 6890 7420 7595 7688 8060 8086 8215 8680 8708 9610 9641 9646 10388 10885 11236 11284 11501 12152 12440 12493 12740 12985 13144 13454 13780 14045 14105 14840 15190 15239 16120 16172 16430 16483 17416 19220 19282 19292 19663 19747 20215 20776 21359 21770 22472 22568 23002 24115 24986 25480 25970 26908 27560 28090 28210 28301 30380 30478 32344 32860 32966 33635 33761 36517 38440 38564 38584 39326 39494 40430 42718 43540 46004 47089 48205 48230 49972 50933 51940 53816 56180 56420 56602 57505 60760 60956 62465 65720 65932 67270 67487 67522 73034 76195 77128 78652 78988 80507 80860 82415 85436 87079 87080 87451 92008 94178 96410 96460 98315 98735 99944 101866 103880 106795 112360 112840 113204 115010 115381 121912 124930 125333 131864 134540 134974 135044 137641 141505 146068 149513 152390 157304 157976 161014 161720 164830 168805 170872 174158 174902 182585 188356 192820 192920 196630 197470 198107 203732 213590 214279 226408 230020 230762 235445 249860 250666 254665 255619 269080 269948 270088 275282 283010 292136 298871 299026 304780 322028 329660 337435 337610 348316 349804 356531 365170 376712 385640 393260 394940 396214 402535 407464 427180 428558 435395 437255 460040 461524 470890 472409 499720 501332 509330 510973 511238 539896 550564 566020 576905 597742 598052 609553 609560 612157 626665 644056 659320 662129 674870 675220 688205 696632 699608 713062 730340 747565 786520 789880 792428 805070 807667 854360 857116 870790 873599 874510 877331 923048 941780 944818 990535 1002664 1018660 1021946 1022476 1046591 1071395 1101128 1132027 1132040 1153810 1195484 1196104 1219106 1224314 1253330 1278095 1324258 1349740 1350440 1376410 1426124 1460680 1494355 1495130 1499953 1584856 1610140 1615334 1714232 1741580 1747198 1749020 1754662 1782655 1789333 1883560 1889636 1981070 2037320 2043892 2044952 2092097 2093182 2142790 2264054 2307620 2362045 2390968 2438212 2448628 2495717 2506660 2554865 2556190 2648516 2699449 2699480 2752820 2852248 2988710 2990260 2999906 3047765 3060785 3220280 3230668 3310645 3483160 3494396 3498040 3509324 3565310 3576811 3578666 3779272 3885323 3962140 4038335 4087784 4184194 4186364 4266871 4285580 4367995 4386655 4528108 4615240 4634903 4724090 4876424 4897256 4991434 5013320 5109730 5112380 5232955 5297032 5398898 5505640 5660135 5977420 5980520 5999812 6095530 6115193 6121570 6141317 6461336 6621290 6642649 6988792 7018648 7130620 7153622 7157332 7499765 7770646 7924189 7924280 8076670 8368388 8372728 8533742 8571160 8735990 8773310 8946665 9056216 9269806 9448180 9982868 10219460 10224760 10460485 10465910 10499671 10797796 11320270 11356787 11954840 11999624 12191060 12230386 12243140 12282634 12478585 13242580 13285298 13497245 14261240 14307244 14314664 14644679 14999530 15541292 15840163 15848378 16153340 16736776 17067484 17471980 17546620 17884055 17893330 18539612 18896143 18896360 19426615 19965736 20438920 20920970 20931820 20999342 21334355 21595592 22640540 22713574 23174515 24382120 24460772 24486280 24565268 24957170 25037677 26485160 26570596 26994490 27081569 27197261 28614488 29289358 29999060 30575965 30706585 31082584 31680326 31696756 32306680 32444321 33213245 34134968 34943960 35092837 35093240 35768110 35786660 37079224 37792286 38853230 39620945 41841940 41863640 41998684 42668710 42806351 45281080 45427148 46349030 46498543 48921544 49130536 49914340 50075354 52498355 53141192 53988980 54163138 54394522 55469323 56783935 58578716 59998120 61151930 61413170 63360652 63393512 64888642 66426490 70185674 71536220 71573320 73223395 75584572 77706460 79200815 79241890 79497509 83683880 83997368 85337420 85612702 90854296 92698060 92997086 94480715 99828680 100150708 104996710 107977960 108326276 108789044 110881141 110938646 113567870 117157432 122303860 122826340 125188385 126721304 129777284 132273001 132852980 135407845 135986305 140371348 143072440 146446790 151169144 155412920 158401630 158483780 158995018 162221605 170674840 171225404 175464185 185396120 185994172 188961430 189570983 190380827 200301416 205922119 209993420 214031755 216652552 217578088 221762282 221877292 227135740 232492715 244607720 245649859 245652680 250376770 259554568 264546002 265705960 270815690 271972610 277346615 280742696 292893580 316803260 316967560 317990036 324443210 325489801 342450808 350928370 352060397 371988344 377922860 379141966 380761654 397487545 411844238 419986840 428063510 443524564 443754584 454271480 464985430 491299718 500753540 529092004 541631380 543945220 554405705 554693230 556482563 585787160 633606520 635980072 648886420 650979602 661365005 701856740 704120794 755845720 758283932 761523308 776167987 794975090 823688476 839528639 856127020 887049128 929970860 947854915 951904135 982599436 1001507080 1029610595 1058184008 1083262760 1087890440 1108811410 1109386460 1112965126 1228249295 1297772840 1301959204 1322730010 1326996881 1403713480 1408241588 1441454833 1516567864 1523046616 1552335974 1589950180 1627449005 1647376952 1679057278 1712254040 1719549013 1760301985 1859941720 1895709830 1903808270 1965198872 2059221190 2217622820 2218772920 2225930252 2456498590 2464422779 2603918408 2645460020 2653993762 2782412815 2816483176 2882909666 3104671948 3179900360 3254898010 3358114556 3439098026 3520603970 3791419660 3807616540 3880839935 4118442380 4197643195 4435245640 4451860504 4912997180 4928845558 5290920040 5307987524 5564825630 5765819332 5876700473 6209343896 6509796020 6634984405 6716229112 6878196052 7041207940 7207274165 7582839320 7615233080 7761679870 8236884760 8395286390 8597745065 9825994360 9857691116 10090183831 10615975048 10913872307 11129651260 11531638664 11753400946 12322113895 13019592040 13269968810 13756392104 14082415880 14414548330 15523359740 16790572780 17195490130 17250959453 19715382232 20180367662 21827744614 22259302520 23506801892 24644227790 26539937620 28829096660 29383502365 31046719480 33581145560 34390980260 34501918906 40360735324 41136903311 43655489228 47013603784 49288455580 50450919155 53079875240 54569361535 57658193320 58767004730 68781960520 69003837812 76397106149 80721470648 82273806622 86254797265 87310978456 98576911160 100901838310 109138723070 117534009460 138007675624 152794212298 164547613244 172509594530 201803676620 205684516555 218277446140 235068018920 305588424596 329095226488 345019189060 381985530745 403607353240 411369033110 436554892280 534779743043 611176849192 690038378120 763971061490 822738066220 1069559486086 1527942122980 1645476132440 2139118972172 2673898715215 3055884245960 4278237944344 5347797430430 10695594860860 21391189721720
• Sum of all divisors σ(n): 63704570398560
• Sum of proper divisors (its aliquot sum) s(n): 42313380676840
• 21391189721720 is an abundant number, because the sum of its proper divisors (42313380676840) is greater than itself. Its abundance is 20922190955120

Bases of 21391189721720

• Binary: 100110111010010000110010000111100001001111000₂
• Hexadecimal: 0x13748643C278
• Base-36: 7KYZ620S8

Squares and roots of 21391189721720

• 21391189721720 squared (21391189721720²) is 457582997710619371039758400
• 21391189721720 cubed (21391189721720³) is 9788244717461227380680810915552032448000
• The square root of 21391189721720 is 4625061.0505938189
• The cube root of 21391189721720 is 27759.5004547599

Scales and comparisons

• 21,391,189,721,720 seconds is equal to 680,173 years, 34 weeks, 4 days, 8 hours, 55 minutes, 20 seconds.
• To count from 1 to 21,391,189,721,720 would take you about one million, seven hundred thousand, four hundred thirty-four 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 21391189721720 cubic inches would be around 2313.3 feet tall.

Recreational maths with 21391189721720

• 21391189721720 backwards is 02712798119312
• 21391189721720 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21391189721720's digits is 53
• More coming soon!