21555122137920

Names of 21555122137920

• Cardinal: 21555122137920 can be written as Twenty-one trillion, five hundred fifty-five billion, one hundred twenty-two million, one hundred thirty-seven thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.155512213792 × 10¹³

Factors of 21555122137920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 726

Divisors of 21555122137920

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 32 35 36 40 42 45 48 54 56 60 63 64 70 72 80 84 90 96 105 108 112 120 126 135 140 144 160 168 180 189 192 210 216 224 240 252 270 280 288 315 320 336 360 378 420 432 448 480 504 540 560 576 630 672 709 720 756 840 864 945 960 1008 1080 1120 1260 1344 1418 1440 1512 1680 1728 1890 2016 2127 2160 2240 2520 2836 2880 3024 3360 3545 3780 4032 4254 4320 4963 5040 5672 6048 6381 6720 7090 7560 8508 8640 9926 10080 10635 11344 12096 12762 14180 14889 15120 17016 19143 19852 20160 21270 22688 24815 25524 28360 29778 30240 31905 34032 38286 39704 42540 44667 45376 49630 51048 56720 59556 60480 63810 68064 74445 76572 79408 85080 89334 95715 99260 102096 113440 119112 127620 134001 136128 148890 153144 158816 170160 178668 191430 198520 204192 223335 226880 238224 255240 268002 297780 306288 317632 340320 357336 382860 397040 408384 446670 476448 502681 510480 536004 595560 612576 670005 680640 714672 765720 794080 893340 952896 1005362 1020960 1072008 1191120 1225152 1340010 1429344 1508043 1531440 1588160 1786680 2010724 2041920 2144016 2382240 2513405 2680020 2858688 3016086 3062880 3518767 3573360 4021448 4288032 4524129 4764480 5026810 5360040 6032172 6125760 7037534 7146720 7540215 8042896 8576064 9048258 10053620 10556301 10720080 12064344 13572387 14075068 14293440 15080430 16085792 17593835 18096516 20107240 21112602 21440160 22620645 24128688 27144774 28150136 30160860 31668903 32171584 35187670 36193032 40214480 42225204 42880320 45241290 48257376 52781505 54289548 56300272 60321720 63337806 67861935 70375340 72386064 80428960 84450408 90482580 95006709 96514752 105563010 108579096 112600544 120643440 126675612 135723870 140750680 144772128 158344515 160857920 168900816 180965160 190013418 211126020 217158192 225201088 241286880 253351224 271447740 281501360 289544256 316689030 337801632 356400829 361930320 380026836 422252040 434316384 475033545 482573760 506702448 542895480 563002720 633378060 675603264 712801658 723860640 760053672 844504080 868632768 950067090 1013404896 1069202487 1085790960 1126005440 1266756120 1425603316 1447721280 1520107344 1689008160 1782004145 1900134180 2026809792 2138404974 2171581920 2494805803 2533512240 2851206632 3040214688 3207607461 3378016320 3564008290 3800268360 4276809948 4343163840 4989611606 5067024480 5346012435 5702413264 6080429376 6415214922 7128016580 7484417409 7600536720 8553619896 9622822383 9979223212 10134048960 10692024870 11404826528 12474029015 12830429844 14256033160 14968834818 15201073440 16038037305 17107239792 19245644766 19958446424 21384049740 22453252227 22809653056 24948058030 25660859688 28512066320 29937669636 30402146880 32076074610 34214479584 37422087045 38491289532 39916892848 42768099480 44906504454 48114111915 49896116060 51321719376 57024132640 59875339272 64152149220 67359756681 68428959168 74844174090 76982579064 79833785696 85536198960 89813008908 96228223830 99792232120 102643438752 112266261135 114048265280 119750678544 128304298440 134719513362 149688348180 153965158128 159667571392 171072397920 179626017816 192456447660 199584464240 205286877504 224532522270 239501357088 256608596880 269439026724 299376696360 307930316256 336798783405 342144795840 359252035632 384912895320 399168928480 449065044540 479002714176 513217193760 538878053448 598753392720 615860632512 673597566810 718504071264 769825790640 798337856960 898130089080 1026434387520 1077756106896 1197506785440 1347195133620 1437008142528 1539651581280 1796260178160 2155512213792 2395013570880 2694390267240 3079303162560 3592520356320 4311024427584 5388780534480 7185040712640 10777561068960 21555122137920
• Sum of all divisors σ(n): 87027525004800
• Sum of proper divisors (its aliquot sum) s(n): 65472402866880
• 21555122137920 is an abundant number, because the sum of its proper divisors (65472402866880) is greater than itself. Its abundance is 43917280728960

Bases of 21555122137920

• Binary: 100111001101010110001011001011110101101000000₂
• Hexadecimal: 0x139AB165EB40
• Base-36: 7N2AB6MO0

Squares and roots of 21555122137920

• 21555122137920 squared (21555122137920²) is 464623290380648871501926400
• 21555122137920 cubed (21555122137920³) is 10015011772277157073685439144566489088000
• The square root of 21555122137920 is 4642749.4158009433
• The cube root of 21555122137920 is 27830.2321670845

Scales and comparisons

• 21,555,122,137,920 seconds is equal to 685,386 years, 10 weeks, 6 days, 7 hours, 12 minutes.
• To count from 1 to 21,555,122,137,920 would take you about one million, seven hundred thirteen thousand, four hundred sixty-five 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 21555122137920 cubic inches would be around 2319.2 feet tall.

Recreational maths with 21555122137920

• 21555122137920 backwards is 02973122155512
• 21555122137920 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21555122137920's digits is 45
• More coming soon!