21812469840

Names of 21812469840

• Cardinal: 21812469840 can be written as Twenty-one billion, eight hundred twelve million, four hundred sixty-nine thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.181246984 × 10¹⁰

Factors of 21812469840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 19145

Divisors of 21812469840

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 35 36 40 42 45 48 56 60 63 70 72 80 84 90 105 112 120 126 140 144 168 180 210 229 240 252 280 315 336 360 420 458 504 560 630 687 720 840 916 1008 1145 1260 1374 1603 1680 1832 2061 2290 2520 2748 3206 3435 3664 4122 4580 4809 5040 5496 6412 6870 8015 8244 9160 9618 10305 10992 12824 13740 14427 16030 16488 18320 18899 19236 20610 24045 25648 27480 28854 32060 32976 37798 38472 41220 48090 54960 56697 57708 64120 72135 75596 76944 82440 94495 96180 113394 115416 128240 132293 144270 151192 164880 170091 188990 192360 226788 230832 264586 283485 288540 302384 340182 377980 384720 396879 453576 529172 566970 577080 661465 680364 755960 793758 850455 907152 1058344 1133940 1154160 1190637 1322930 1360728 1511920 1587516 1700910 1984395 2116688 2267880 2381274 2645860 2721456 3175032 3401820 3968790 4327871 4535760 4762548 5291720 5953185 6350064 6803640 7937580 8655742 9525096 10583440 11906370 12983613 13607280 15875160 17311484 19050192 21639355 23812740 25967226 30295097 31750320 34622968 38950839 43278710 47625480 51934452 60590194 64918065 69245936 77901678 86557420 90885291 95250960 103868904 121180388 129836130 151475485 155803356 173114840 181770582 194754195 207737808 242360776 259672260 272655873 302950970 311606712 346229680 363541164 389508390 454426455 484721552 519344520 545311746 605901940 623213424 727082328 779016780 908852910 1038689040 1090623492 1211803880 1363279365 1454164656 1558033560 1817705820 2181246984 2423607760 2726558730 3116067120 3635411640 4362493968 5453117460 7270823280 10906234920 21812469840
• Sum of all divisors σ(n): 84088368000
• Sum of proper divisors (its aliquot sum) s(n): 62275898160
• 21812469840 is an abundant number, because the sum of its proper divisors (62275898160) is greater than itself. Its abundance is 40463428320

Bases of 21812469840

• Binary: 10100010100000111111110000001010000₂
• Hexadecimal: 0x5141FE050
• Base-36: A0QKXG0

Squares and roots of 21812469840

• 21812469840 squared (21812469840²) is 475783840520909625600
• 21812469840 cubed (21812469840³) is 10378020671721711097765691904000
• The square root of 21812469840 is 147690.4527720055
• The cube root of 21812469840 is 2794.0549815845

Scales and comparisons

• 21,812,469,840 seconds is equal to 693 years, 29 weeks, 4 days, 3 hours, 24 minutes.
• To count from 1 to 21,812,469,840 would take you about one thousand, three hundred eighty-seven 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 21812469840 cubic inches would be around 232.8 feet tall.

Recreational maths with 21812469840

• 21812469840 backwards is 04896421812
• 21812469840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21812469840's digits is 45
• More coming soon!