21018897900

Names of 21018897900

• Cardinal: 21018897900 can be written as Twenty-one billion, eighteen million, eight hundred ninety-seven thousand, nine hundred.

Scientific notation

• Scientific notation: 2.10188979 × 10¹⁰

Factors of 21018897900

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 142

Divisors of 21018897900

• Number of divisors d(n): 1296
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 11 12 13 14 15 18 20 21 22 25 26 27 28 30 33 35 36 39 42 44 45 49 50 52 54 55 60 63 65 66 70 75 77 78 84 90 91 98 99 100 101 105 108 110 117 121 126 130 132 135 140 143 147 150 154 156 165 175 180 182 189 195 196 198 202 210 220 225 231 234 242 245 252 260 270 273 275 286 294 297 300 303 308 315 325 330 350 351 363 364 378 385 390 396 404 420 429 441 450 455 462 468 484 490 495 505 525 539 540 546 550 572 585 588 594 605 606 630 637 650 660 675 693 700 702 707 715 726 735 756 770 780 819 825 847 858 882 900 909 910 924 945 975 980 990 1001 1010 1050 1078 1089 1092 1100 1111 1155 1170 1188 1210 1212 1225 1260 1274 1287 1300 1313 1323 1350 1365 1386 1404 1414 1430 1452 1470 1485 1515 1540 1573 1575 1617 1638 1650 1694 1716 1755 1764 1815 1818 1820 1890 1911 1925 1950 1980 2002 2020 2079 2100 2121 2145 2156 2178 2205 2222 2275 2310 2340 2420 2450 2457 2475 2525 2541 2548 2574 2626 2646 2695 2700 2727 2730 2772 2828 2860 2925 2940 2970 3003 3025 3030 3146 3150 3185 3234 3267 3276 3300 3333 3388 3465 3510 3535 3575 3630 3636 3675 3780 3822 3850 3861 3900 3939 4004 4095 4158 4235 4242 4290 4356 4410 4444 4545 4550 4620 4719 4725 4851 4900 4914 4949 4950 5005 5050 5082 5148 5252 5292 5390 5445 5454 5460 5555 5733 5775 5850 5929 5940 6006 6050 6060 6292 6300 6363 6370 6435 6468 6534 6565 6615 6666 6825 6930 7007 7020 7070 7150 7260 7350 7425 7575 7623 7644 7700 7722 7777 7865 7878 8085 8190 8316 8470 8484 8580 8775 8820 9009 9075 9090 9100 9191 9438 9450 9555 9702 9828 9898 9900 9999 10010 10100 10164 10395 10605 10725 10780 10890 10908 11011 11025 11110 11466 11550 11700 11817 11858 12012 12100 12221 12285 12705 12726 12740 12870 13068 13130 13230 13332 13475 13635 13650 13860 14014 14140 14157 14300 14443 14553 14700 14847 14850 15015 15150 15246 15444 15554 15730 15756 15925 16170 16335 16380 16665 16940 17199 17325 17550 17675 17787 18018 18150 18180 18382 18876 18900 19089 19110 19305 19404 19695 19796 19998 20020 20475 20790 21021 21175 21210 21450 21780 22022 22050 22220 22725 22869 22932 23100 23331 23595 23634 23716 24255 24442 24570 24745 25025 25410 25452 25740 26260 26460 26950 27027 27225 27270 27300 27573 27775 28028 28314 28665 28886 29106 29645 29694 29700 29997 30030 30300 30492 31108 31460 31815 31850 32175 32340 32670 32825 33033 33075 33330 34398 34650 35035 35100 35350 35451 35574 36036 36300 36663 36764 38115 38178 38220 38610 38885 39325 39390 39996 40425 40950 41580 42042 42350 42420 42471 42900 43329 44044 44100 44541 45045 45450 45738 45955 46662 47190 47268 47775 48510 48884 49140 49490 49995 50050 50820 51975 53025 53361 53900 54054 54439 54450 54540 55055 55146 55550 56628 57330 57772 58212 59085 59290 59388 59994 60060 61105 61425 63063 63525 63630 63700 64337 64350 65340 65650 66066 66150 66660 68175 68796 69300 69993 70070 70700 70785 70902 71148 72215 72765 73326 74235 75075 76230 76356 77077 77220 77770 78650 78780 80850 81675 81900 82719 83325 84084 84700 84942 85547 85995 86658 88935 89082 90090 90900 91476 91910 93324 94380 95445 95550 96525 97020 98475 98980 99099 99990 100100 101101 103950 105105 106050 106722 108108 108878 108900 109989 110110 110292 111100 114345 114660 116655 117975 118170 118580 119988 121275 122210 122850 123725 126126 127050 127260 128674 128700 129987 131300 132132 132300 133623 135135 136350 137865 139986 140140 141570 141804 143325 144430 145530 146652 148225 148470 149985 150150 152460 154154 155540 157300 158873 159075 160083 161700 163317 163350 165165 165438 166650 169884 171094 171990 173316 175175 177255 177870 178164 180180 183315 183820 189189 190575 190890 191100 193011 193050 194425 196950 198198 199980 202202 207900 209979 210210 212100 212355 213444 216645 217756 219978 220220 222705 225225 228690 229775 231231 233310 235950 236340 242550 244420 245700 247450 248157 249975 252252 254100 256641 257348 259974 266805 267246 270270 272195 272700 275275 275730 279972 283140 286650 288860 291060 295425 296450 296940 297297 299970 300300 303303 305525 308308 315315 317746 318150 320166 321685 326634 326700 329967 330330 330876 333300 342188 343980 349965 350350 353925 354510 355740 361075 363825 366630 371175 378378 381150 381780 385385 386022 386100 388850 389961 393900 396396 404404 413595 419958 420420 424710 427735 429975 433290 439956 444675 445410 450450 457380 459550 462462 466620 471900 476619 477225 485100 489951 494900 495495 496314 499950 505505 513282 519948 525525 533610 534492 540540 544390 549945 550550 551460 571725 573300 579033 583275 590850 592900 594594 598829 599940 606606 611050 630630 635492 636300 640332 643370 649935 653268 659934 660660 668115 675675 689325 693693 699930 700700 707707 707850 709020 722150 727650 733260 742350 749925 756756 762300 769923 770770 772044 777700 779922 794365 800415 816585 825825 827190 839916 849420 855470 859950 866580 886275 889350 890820 900900 909909 916575 919100 924924 945945 953238 954450 965055 979902 990990 992628 999900 1011010 1026564 1049895 1051050 1061775 1067220 1083225 1088780 1099890 1101100 1112111 1113525 1143450 1156155 1158066 1166550 1181700 1189188 1197658 1213212 1222100 1240785 1261260 1283205 1286740 1299870 1319868 1334025 1336230 1351350 1360975 1378650 1387386 1399860 1415414 1415700 1429857 1444300 1455300 1469853 1484700 1486485 1499850 1516515 1539846 1541540 1559844 1576575 1588730 1600830 1608425 1633170 1649835 1651650 1654380 1710940 1719900 1737099 1749825 1772550 1778700 1796487 1819818 1833150 1891890 1906476 1908900 1926925 1930110 1949805 1959804 1981980 2022020 2067975 2081079 2099790 2102100 2123121 2123550 2138675 2166450 2199780 2224222 2227050 2286900 2309769 2312310 2316132 2333100 2383095 2395316 2449755 2477475 2481570 2527525 2566410 2599740 2668050 2672460 2702700 2721950 2729727 2749725 2757300 2774772 2830828 2859714 2895165 2939706 2972970 2994145 2999700 3033030 3079692 3153150 3177460 3201660 3216850 3249675 3266340 3299670 3303300 3336333 3340575 3468465 3474198 3499650 3538535 3545100 3592974 3639636 3666300 3783780 3849615 3853850 3860220 3899610 3971825 4002075 4082925 4135950 4162158 4199580 4246242 4247100 4277350 4289571 4332900 4448444 4454100 4549545 4619538 4624620 4729725 4766190 4825275 4899510 4954950 4963140 5055050 5132820 5249475 5336100 5389461 5443900 5459454 5499450 5560555 5719428 5780775 5790330 5879412 5945940 5988290 6066060 6203925 6306300 6369363 6416025 6433700 6499350 6599340 6672666 6681150 6936930 6948396 6999300 7077070 7149285 7185948 7349265 7432425 7582575 7699230 7707700 7784777 7799220 7943650 8004150 8165850 8249175 8271900 8324316 8492484 8554700 8579142 8685495 8982435 9099090 9239076 9459450 9532380 9650550 9749025 9799020 9909900 10008999 10110100 10405395 10498950 10615605 10778922 10918908 10998900 11121110 11548845 11561550 11580660 11915475 11976580 12248775 12407850 12738726 12832050 12998700 13345332 13362300 13648635 13873860 14154140 14298570 14475825 14698530 14864850 14970725 15165150 15398460 15569554 15887300 16008300 16168383 16331700 16498350 16681665 17158284 17342325 17370990 17692675 17964870 18198180 18918900 19108089 19248075 19301100 19498050 20017998 20810790 20997900 21231210 21447855 21557844 22242220 22747725 23097690 23123100 23354331 23830950 24497550 24815700 25477452 25664100 26947305 27297270 27802775 28597140 28951650 29397060 29729700 29941450 30026997 30330300 31139108 31846815 32336766 32996700 33363330 34684650 34741980 35385350 35746425 35929740 36746325 38216178 38496150 38923885 38996100 40035996 41621580 42462420 42895710 43427475 44912175 45495450 46195380 46708662 47661900 48995100 50044995 52026975 53078025 53894610 54594540 55605550 57744225 57903300 59882900 60053994 63693630 64673532 66726660 68243175 69369300 70062993 70770700 71492850 73492650 76432356 76992300 77847770 80841915 83408325 85791420 86854950 89824350 90990900 93417324 95540445 100089990 104053950 106156050 107239275 107789220 111211100 115488450 116771655 120107988 127387260 134736525 136486350 140125986 142985700 146985300 150134985 155695540 159234075 161683830 166816650 173709900 179648700 191080890 194619425 200179980 208107900 210188979 212312100 214478550 230976900 233543310 250224975 269473050 272972700 280251972 300269970 318468150 323367660 333633300 350314965 382161780 389238850 404209575 420377958 428957100 467086620 477702225 500449950 538946100 583858275 600539940 636936300 700629930 750674925 778477700 808419150 840755916 955404450 1000899900 1050944895 1167716550 1401259860 1501349850 1616838300 1751574825 1910808900 2101889790 2335433100 3002699700 3503149650 4203779580 5254724475 7006299300 10509448950 21018897900
• Sum of all divisors σ(n): 93966798240
• Sum of proper divisors (its aliquot sum) s(n): 72947900340
• 21018897900 is an abundant number, because the sum of its proper divisors (72947900340) is greater than itself. Its abundance is 51929002440

Bases of 21018897900

• Binary: 10011100100110100101110110111101100₂
• Hexadecimal: 0x4E4D2EDEC
• Base-36: 9NM3XF0

Squares and roots of 21018897900

• 21018897900 squared (21018897900²) is 441794068930624410000
• 21018897900 cubed (21018897900³) is 9286024427678356657037739000000
• The square root of 21018897900 is 144978.9567489021
• The cube root of 21018897900 is 2759.7515135459

Scales and comparisons

• 21,018,897,900 seconds is equal to 668 years, 17 weeks, 3 days, 6 hours, 45 minutes.
• To count from 1 to 21,018,897,900 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 21018897900 cubic inches would be around 230 feet tall.

Recreational maths with 21018897900

• 21018897900 backwards is 00979881012
• 21018897900 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21018897900's digits is 45
• More coming soon!