18638845457920

Names of 18638845457920

• Cardinal: 18638845457920 can be written as Eighteen trillion, six hundred thirty-eight billion, eight hundred forty-five million, four hundred fifty-seven thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.863884545792 × 10¹³

Factors of 18638845457920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 4861

Divisors of 18638845457920

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 59 64 80 103 118 128 160 206 236 256 271 295 320 412 472 512 515 542 590 640 824 944 1030 1084 1180 1280 1355 1648 1888 2060 2168 2360 2560 2710 3296 3776 4120 4336 4421 4720 5420 6077 6592 7552 8240 8672 8842 9440 10840 12154 13184 15104 15989 16480 17344 17684 18880 21680 22105 24308 26368 27913 30208 30385 31978 32960 34688 35368 37760 43360 44210 48616 52736 55826 60770 63956 65920 69376 70736 75520 79945 86720 88420 97232 111652 121540 127912 131840 138752 139565 141472 151040 159890 173440 176840 194464 223304 243080 255824 260839 263680 279130 282944 319780 346880 353680 388928 446608 455363 486160 511648 521678 558260 565888 639560 693760 707360 777856 893216 910726 972320 1023296 1043356 1116520 1131776 1198091 1279120 1304195 1414720 1555712 1646867 1786432 1821452 1944640 2046592 2086712 2233040 2263552 2276815 2396182 2558240 2608390 2829440 3111424 3293734 3572864 3642904 3889280 4093184 4173424 4466080 4553630 4792364 5116480 5216780 5658880 5990455 6587468 7145728 7285808 7778560 8186368 8234335 8346848 8932160 9107260 9584728 10232960 10433560 11317760 11980910 13174936 14291456 14571616 15557120 16468670 16693696 17864320 18214520 19169456 20465920 20867120 23961820 26349872 26866417 29143232 32937340 33387392 35728640 36429040 38338912 40931840 41734240 47923640 52699744 53732834 58286464 65874680 66774784 70687369 71457280 72858080 76677824 83468480 95847280 105399488 107465668 116572928 123403373 131749360 133549568 134332085 141374738 145716160 153355648 166936960 191694560 210798976 214931336 233145856 246806746 263498720 268664170 282749476 291432320 306711296 333873920 353436845 383389120 421597952 429862672 493613492 526997440 537328340 565498952 582864640 613422592 617016865 667747840 706873690 766778240 843195904 859725344 987226984 1053994880 1074656680 1130997904 1165729280 1234033730 1413747380 1533556480 1719450688 1974453968 2107989760 2149313360 2261995808 2468067460 2827494760 3067112960 3438901376 3948907936 4215979520 4298626720 4523991616 4936134920 5654989520 6877802752 7280799007 7897815872 8597253440 9047983232 9872269840 11309979040 13755605504 14561598014 15795631744 17194506880 18095966464 19744539680 22619958080 29123196028 31591263488 34389013760 36191932928 36403995035 39489079360 45239916160 58246392056 63182526976 68778027520 72807990070 78978158720 90479832320 116492784112 145615980140 157956317440 180959664640 232985568224 291231960280 315912634880 465971136448 582463920560 931942272896 1164927841120 1863884545792 2329855682240 3727769091584 4659711364480 9319422728960 18638845457920
• Sum of all divisors σ(n): 46067974318080
• Sum of proper divisors (its aliquot sum) s(n): 27429128860160
• 18638845457920 is an abundant number, because the sum of its proper divisors (27429128860160) is greater than itself. Its abundance is 8790283402240

Bases of 18638845457920

• Binary: 100001111001110110001110000110011011000000000₂
• Hexadecimal: 0x10F3B1C33600
• Base-36: 6LUKFCF0G

Squares and roots of 18638845457920

• 18638845457920 squared (18638845457920²) is 347406560004225014490726400
• 18638845457920 cubed (18638845457920³) is 6475257182986361347350121942601433088000
• The square root of 18638845457920 is 4317272.9190914025
• The cube root of 18638845457920 is 26513.8626687817

Scales and comparisons

• 18,638,845,457,920 seconds is equal to 592,657 years, 32 weeks, 5 days, 23 hours, 38 minutes, 40 seconds.
• To count from 1 to 18,638,845,457,920 would take you about one million, four hundred eighty-one thousand, six hundred forty-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 18638845457920 cubic inches would be around 2209.5 feet tall.

Recreational maths with 18638845457920

• 18638845457920 backwards is 02975454883681
• The number of decimal digits it has is: 14
• The sum of 18638845457920's digits is 70
• More coming soon!