21157899840

Names of 21157899840

• Cardinal: 21157899840 can be written as Twenty-one billion, one hundred fifty-seven million, eight hundred ninety-nine thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.115789984 × 10¹⁰

Factors of 21157899840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 10629

Divisors of 21157899840

• Number of divisors d(n): 560
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 18 20 21 22 24 27 28 30 32 33 35 36 40 42 44 45 48 54 55 56 60 63 64 66 70 72 77 80 81 84 88 90 96 99 105 108 110 112 120 126 132 135 140 144 154 160 162 165 168 176 180 189 192 198 210 216 220 224 231 240 252 264 270 280 288 297 308 315 320 324 330 336 352 360 378 385 396 405 420 432 440 448 462 480 495 504 528 540 560 567 576 594 616 630 648 660 672 693 704 720 756 770 792 810 840 864 880 891 924 945 960 990 1008 1056 1080 1120 1134 1155 1188 1232 1260 1296 1320 1344 1386 1440 1485 1512 1540 1584 1620 1680 1728 1760 1782 1848 1890 1980 2016 2079 2112 2160 2240 2268 2310 2376 2464 2520 2592 2640 2772 2835 2880 2970 3024 3080 3168 3240 3360 3465 3520 3564 3696 3780 3960 4032 4158 4320 4455 4536 4620 4752 4928 5040 5184 5280 5544 5670 5940 6048 6160 6237 6336 6480 6720 6930 7128 7392 7560 7920 8316 8640 8910 9072 9240 9504 10080 10395 10560 10601 11088 11340 11880 12096 12320 12474 12960 13860 14256 14784 15120 15840 16632 17820 18144 18480 19008 20160 20790 21202 22176 22680 23760 24640 24948 25920 27720 28512 30240 31185 31680 31803 33264 35640 36288 36960 41580 42404 44352 45360 47520 49896 53005 55440 57024 60480 62370 63606 66528 71280 73920 74207 83160 84808 90720 95040 95409 99792 106010 110880 116611 124740 127212 133056 142560 148414 159015 166320 169616 181440 190818 199584 212020 221760 222621 233222 249480 254424 285120 286227 296828 318030 332640 339232 349833 371035 381636 399168 424040 445242 466444 477045 498960 508848 572454 583055 593656 636060 665280 667863 678464 699666 742070 763272 816277 848080 858681 890484 932888 954090 997920 1017696 1049499 1113105 1144908 1166110 1187312 1272120 1335726 1399332 1431135 1484140 1526544 1632554 1696160 1717362 1749165 1780968 1865776 1908180 1995840 2003589 2035392 2098998 2226210 2289816 2332220 2374624 2448831 2544240 2671452 2798664 2862270 2968280 3053088 3148497 3265108 3339315 3392320 3434724 3498330 3561936 3731552 3816360 4007178 4081385 4197996 4293405 4452420 4579632 4664440 4749248 4897662 5088480 5247495 5342904 5597328 5724540 5936560 6010767 6106176 6296994 6530216 6678630 6869448 6996660 7123872 7346493 7463104 7632720 8014356 8162770 8395992 8586810 8904840 9159264 9328880 9445491 9795324 10017945 10176960 10494990 10685808 11194656 11449080 11873120 12021534 12244155 12593988 13060432 13357260 13738896 13993320 14247744 14692986 15265440 15742485 16028712 16325540 16791984 17173620 17809680 18318528 18657760 18890982 19590648 20035890 20989980 21371616 22039479 22389312 22898160 23746240 24043068 24488310 25187976 26120864 26714520 27477792 27986640 29385972 30053835 30530880 31484970 32057424 32651080 33583968 34347240 35619360 36732465 37315520 37781964 39181296 40071780 41979960 42743232 44078958 45796320 47227455 48086136 48976620 50375952 52241728 53429040 54955584 55973280 58771944 60107670 62969940 64114848 65302160 66118437 67167936 68694480 71238720 73464930 75563928 78362592 80143560 83959920 88157916 91592640 94454910 96172272 97953240 100751904 106858080 110197395 111946560 117543888 120215340 125939880 128229696 130604320 132236874 137388960 146929860 151127856 156725184 160287120 167919840 176315832 188909820 192344544 195906480 201503808 213716160 220394790 235087776 240430680 251879760 261208640 264473748 274777920 293859720 302255712 320574240 330592185 335839680 352631664 377819640 384689088 391812960 440789580 470175552 480861360 503759520 528947496 587719440 604511424 641148480 661184370 705263328 755639280 783625920 881579160 961722720 1007519040 1057894992 1175438880 1322368740 1410526656 1511278560 1763158320 1923445440 2115789984 2350877760 2644737480 3022557120 3526316640 4231579968 5289474960 7052633280 10578949920 21157899840
• Sum of all divisors σ(n): 93842457984
• Sum of proper divisors (its aliquot sum) s(n): 72684558144
• 21157899840 is an abundant number, because the sum of its proper divisors (72684558144) is greater than itself. Its abundance is 51526658304

Bases of 21157899840

• Binary: 10011101101000110111110111001000000₂
• Hexadecimal: 0x4ED1BEE40
• Base-36: 9PWV800

Squares and roots of 21157899840

• 21157899840 squared (21157899840²) is 447656725639472025600
• 21157899840 cubed (21157899840³) is 9471476163782309068126715904000
• The square root of 21157899840 is 145457.5533961713
• The cube root of 21157899840 is 2765.8217378917

Scales and comparisons

• 21,157,899,840 seconds is equal to 672 years, 39 weeks, 2 days, 2 hours, 24 minutes.
• To count from 1 to 21,157,899,840 would take you about one thousand, three hundred forty-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 21157899840 cubic inches would be around 230.5 feet tall.

Recreational maths with 21157899840

• 21157899840 backwards is 04899875112
• 21157899840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21157899840's digits is 54
• More coming soon!