21681399308940

Names of 21681399308940

• Cardinal: 21681399308940 can be written as Twenty-one trillion, six hundred eighty-one billion, three hundred ninety-nine million, three hundred eight thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.168139930894 × 10¹³

Factors of 21681399308940

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 24722

Divisors of 21681399308940

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 43 45 54 60 63 70 84 86 90 105 108 126 129 135 140 172 180 189 210 215 252 258 270 301 315 378 387 420 430 516 540 602 630 645 756 774 860 903 945 1161 1204 1260 1290 1505 1548 1806 1890 1935 2322 2580 2709 3010 3612 3780 3870 4515 4644 5418 5805 6020 7740 8011 8127 9030 10836 11610 13545 16022 16254 16651 18060 23220 24033 27090 32044 32508 33302 40055 40635 48066 49953 54180 56077 66604 72099 80110 81270 83255 96132 99906 112154 116557 120165 144198 149859 160220 162540 166510 168231 199812 216297 224308 233114 240330 249765 280385 288396 299718 333020 336462 344473 349671 360495 432594 449577 466228 480660 499530 504693 560770 582785 599436 672924 688946 699342 715993 720990 749295 841155 865188 899154 999060 1009386 1033419 1049013 1081485 1121540 1165570 1377892 1398684 1431986 1441980 1498590 1514079 1682310 1722365 1748355 1798308 2018772 2066838 2098026 2147979 2162970 2247885 2331140 2411311 2523465 2863972 2997180 3028158 3100257 3147039 3364620 3444730 3496710 3579965 4133676 4196052 4295958 4325940 4495770 4822622 5011951 5046930 5167095 5245065 6056316 6200514 6294078 6443937 6889460 6993420 7159930 7233933 7570395 8591916 8991540 9300771 9645244 10023902 10093860 10334190 10490130 10739895 12056555 12401028 12588156 12887874 14319860 14467866 15035853 15140790 15501285 15735195 18601542 19331811 20047804 20668380 20980260 21479790 21701799 24113110 25059755 25775748 28935732 30071706 30281580 31002570 31470390 32219685 36169665 37203084 38663622 42959580 43403598 45107559 46503855 48226220 50119510 60143412 62005140 62940780 64439370 65105397 72339330 75179265 77327244 86807196 90215118 93007710 96659055 100239020 108508995 128878740 130210794 133391161 135322677 144678660 150358530 180430236 186015420 193318110 217017990 225537795 260421588 266782322 270645354 300717060 325526985 386636220 400173483 434035980 451075590 533564644 541290708 651053970 666955805 676613385 800346966 902151180 933738127 1200520449 1302107940 1333911610 1353226770 1600693932 1867476254 2000867415 2401040898 2667823220 2706453540 2801214381 3601561347 3734952508 4001734830 4668690635 4802081796 5602428762 5735819923 6002602245 7203122694 8003469660 8403643143 9337381270 11204857524 11471639846 12005204490 14006071905 14406245388 16807286286 17207459769 18007806735 18674762540 22943279692 24010408980 25210929429 28012143810 28679099615 33614572572 34414919538 36015613470 40150739461 42018215715 50421858858 51622379307 56024287620 57358199230 68829839076 72031226940 80301478922 84036431430 86037298845 100843717716 103244758614 114716398460 120452218383 126054647145 154867137921 160602957844 168072862860 172074597690 200753697305 206489517228 240904436766 252109294290 258111896535 309734275842 344149195380 361356655149 401507394610 481808873532 504218588580 516223793070 602261091915 619468551684 722713310298 774335689605 803014789220 1032447586140 1084069965447 1204522183830 1445426620596 1548671379210 1806783275745 2168139930894 2409044367660 3097342758420 3613566551490 4336279861788 5420349827235 7227133102980 10840699654470 21681399308940
• Sum of all divisors σ(n): 78896781680640
• Sum of proper divisors (its aliquot sum) s(n): 57215382371700
• 21681399308940 is an abundant number, because the sum of its proper divisors (57215382371700) is greater than itself. Its abundance is 35533983062760

Bases of 21681399308940

• Binary: 100111011100000011000000110101010001010001100₂
• Hexadecimal: 0x13B8181AA28C
• Base-36: 7OOAPCNF0

Squares and roots of 21681399308940

• 21681399308940 squared (21681399308940²) is 470083075993703909563923600
• 21681399308940 cubed (21681399308940³) is 10192058878994281448610229397794956984000
• The square root of 21681399308940 is 4656328.9519684925
• The cube root of 21681399308940 is 27884.4726784107

Scales and comparisons

• 21,681,399,308,940 seconds is equal to 689,401 years, 22 weeks, 3 days, 15 hours, 9 minutes.
• To count from 1 to 21,681,399,308,940 would take you about one million, seven hundred twenty-three thousand, five hundred three 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 21681399308940 cubic inches would be around 2323.7 feet tall.

Recreational maths with 21681399308940

• 21681399308940 backwards is 04980399318612
• 21681399308940 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21681399308940's digits is 63
• More coming soon!