21387398384640

Names of 21387398384640

• Cardinal: 21387398384640 can be written as Twenty-one trillion, three hundred eighty-seven billion, three hundred ninety-eight million, three hundred eighty-four thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.138739838464 × 10¹³

Factors of 21387398384640

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 105230

Divisors of 21387398384640

• Number of divisors d(n): 704
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 17 19 20 24 30 32 34 38 40 41 48 51 57 60 64 68 76 80 82 85 95 96 102 114 120 123 128 136 152 160 164 170 190 192 204 205 228 240 246 255 256 272 285 304 320 323 328 340 380 384 408 410 456 480 492 510 512 544 570 608 615 640 646 656 680 697 760 768 779 816 820 912 960 969 984 1020 1024 1088 1140 1216 1230 1280 1292 1312 1360 1394 1520 1536 1558 1615 1632 1640 1824 1920 1938 1968 2040 2091 2176 2280 2337 2432 2460 2560 2584 2624 2720 2788 3040 3072 3116 3230 3264 3280 3485 3648 3840 3876 3895 3936 4080 4182 4352 4560 4674 4845 4864 4920 5120 5168 5248 5440 5576 6080 6232 6460 6528 6560 6970 7296 7680 7752 7790 7872 8160 8364 8704 9120 9348 9690 9728 9840 10336 10455 10496 10880 11152 11685 12160 12464 12920 13056 13120 13243 13940 14592 15360 15504 15580 15744 16320 16728 17408 18240 18696 19380 19456 19680 20672 20910 20992 21760 22304 23370 24320 24928 25840 26112 26240 26486 27880 29184 31008 31160 31488 32640 33456 36480 37392 38760 39360 39729 41344 41820 41984 43520 44608 46740 48640 49856 51680 52224 52480 52972 55760 58368 62016 62320 62976 65280 66215 66912 72960 74784 77520 78720 79458 82688 83640 87040 89216 93480 97280 99712 103360 104960 105143 105944 111520 124032 124640 125952 130560 132430 133824 145920 149568 155040 157440 158916 165376 167280 178432 186960 198645 199424 206720 209920 210286 211888 223040 248064 249280 261120 264860 267648 291840 299136 310080 314880 315429 317832 330752 334560 356864 373920 397290 398848 413440 420572 423776 446080 496128 498560 525715 529720 535296 598272 620160 629760 630858 635664 669120 713728 747840 794580 797696 826880 841144 847552 892160 992256 997120 1051430 1059440 1070592 1196544 1240320 1261716 1271328 1338240 1495680 1577145 1589160 1653760 1682288 1695104 1784320 1787431 1994240 1997717 2102860 2118880 2141184 2393088 2480640 2523432 2542656 2676480 2991360 3154290 3178320 3364576 3390208 3568640 3574862 3988480 3995434 4205720 4237760 4310863 4961280 5046864 5085312 5352960 5362293 5982720 5993151 6308580 6356640 6729152 6780416 7149724 7990868 8411440 8475520 8621726 8937155 9988585 10093728 10170624 10705920 10724586 11965440 11986302 12617160 12713280 12932589 13458304 13560832 14299448 15981736 16822880 16951040 17243452 17874310 19977170 20187456 20341248 21449172 21554315 23972604 25234320 25426560 25865178 26811465 26916608 28598896 29965755 31963472 33645760 33902080 33961189 34486904 35748620 39954340 40374912 40682496 42898344 43108630 47945208 50468640 50853120 51730356 53622930 53833216 57197792 59931510 63926944 64662945 67291520 67804160 67922378 68973808 71497240 73284671 79908680 80749824 81906397 85796688 86217260 95890416 100937280 101706240 101883567 103460712 107245860 107666432 114395584 119863020 127853888 129325890 134583040 135844756 137947616 142994480 146569342 159817360 161499648 163812794 169805945 171593376 172434520 191780832 201874560 203412480 203767134 206921424 214491720 219854013 228791168 239726040 245719191 255707776 258651780 269166080 271689512 275895232 285988960 293138684 319634720 322999296 327625588 339611890 343186752 344869040 366423355 383561664 403749120 407534268 409531985 413842848 428983440 439708026 457582336 479452080 491438382 509417835 511415552 517303560 538332160 543379024 551790464 571977920 586277368 639269440 655251176 679223780 686373504 689738080 732846710 767123328 807498240 815068536 819063970 827685696 857966880 879416052 915164672 958904160 982876764 1018835670 1022831104 1034607120 1086758048 1099270065 1103580928 1143955840 1172554736 1228595955 1278538880 1310502352 1358447560 1372747008 1379476160 1392408749 1465693420 1534246656 1614996480 1630137072 1638127940 1655371392 1715933760 1758832104 1830329344 1917808320 1965753528 2037671340 2045662208 2069214240 2173516096 2198540130 2207161856 2287911680 2345109472 2457191910 2557077760 2621004704 2716895120 2745494016 2758952320 2784817498 2931386840 3068493312 3260274144 3276255880 3310742784 3431867520 3517664208 3835616640 3931507056 4075342680 4138428480 4177226247 4347032192 4397080260 4414323712 4575823360 4690218944 4914383820 5114155520 5242009408 5433790240 5490988032 5517904640 5569634996 5862773680 6136986624 6520548288 6552511760 6621485568 6863735040 6962043745 7035328416 7671233280 7863014112 8150685360 8276856960 8354452494 8694064384 8794160520 9151646720 9380437888 9828767640 10228311040 10484018816 10867580480 11035809280 11139269992 11725547360 13041096576 13105023520 13242971136 13727470080 13924087490 14070656832 15342466560 15726028224 16301370720 16553713920 16708904988 17388128768 17588321040 18760875776 19657535280 20886131235 20968037632 21735160960 22071618560 22278539984 23451094720 26082193152 26210047040 27454940160 27848174980 28141313664 30684933120 31452056448 32602741440 33107427840 33417809976 34776257536 35176642080 37521751552 39315070560 41772262470 41936075264 43470321920 44557079968 46902189440 52164386304 52420094080 55696349960 56282627328 62904112896 65205482880 66214855680 66835619952 70353284160 75043503104 78630141120 83544524940 83872150528 86940643840 89114159936 93804378880 104328772608 104840188160 111392699920 112565254656 125808225792 130410965760 133671239904 140706568320 157260282240 167089049880 173881287680 178228319872 187608757760 209680376320 222785399840 225130509312 251616451584 260821931520 267342479808 281413136640 314520564480 334178099760 356456639744 375217515520 419360752640 445570799680 521643863040 534684959616 562826273280 629041128960 668356199520 712913279488 891141599360 1069369919232 1125652546560 1258082257920 1336712399040 1425826558976 1782283198720 2138739838464 2673424798080 3564566397440 4277479676928 5346849596160 7129132794880 10693699192320 21387398384640
• Sum of all divisors σ(n): 78102578211840
• Sum of proper divisors (its aliquot sum) s(n): 56715179827200
• 21387398384640 is an abundant number, because the sum of its proper divisors (56715179827200) is greater than itself. Its abundance is 35327781442560

Bases of 21387398384640

• Binary: 100110111001110100100010010001000110000000000₂
• Hexadecimal: 0x1373A4488C00
• Base-36: 7KX8GSIDC

Squares and roots of 21387398384640

• 21387398384640 squared (21387398384640²) is 457420809663301681387929600
• 21387398384640 cubed (21387398384640³) is 9783041085693619282805201480234041344000
• The square root of 21387398384640 is 4624651.1635625017
• The cube root of 21387398384640 is 27757.8603427447

Scales and comparisons

• 21,387,398,384,640 seconds is equal to 680,053 years, 5 weeks, 6 days, 3 hours, 44 minutes.
• To count from 1 to 21,387,398,384,640 would take you about one million, seven hundred thousand, one hundred thirty-two 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 21387398384640 cubic inches would be around 2313.2 feet tall.

Recreational maths with 21387398384640

• 21387398384640 backwards is 04648389378312
• The number of decimal digits it has is: 14
• The sum of 21387398384640's digits is 66
• More coming soon!