21008959920

Names of 21008959920

• Cardinal: 21008959920 can be written as Twenty-one billion, eight million, nine hundred fifty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.100895992 × 10¹⁰

Factors of 21008959920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 4289

Divisors of 21008959920

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 23 24 26 30 36 39 40 45 46 48 52 60 65 69 72 78 80 90 92 104 115 117 120 130 138 144 156 180 184 195 207 208 230 234 240 260 276 299 312 345 360 368 390 414 460 468 520 529 552 585 598 624 690 720 780 828 897 920 936 1035 1040 1058 1104 1170 1196 1380 1495 1560 1587 1656 1794 1840 1872 2070 2116 2340 2392 2645 2691 2760 2990 3120 3174 3312 3588 4140 4232 4243 4485 4680 4761 4784 5290 5382 5520 5980 6348 6877 7176 7935 8280 8464 8486 8970 9360 9522 10580 10764 11960 12696 12729 13455 13754 14352 15870 16560 16972 17940 19044 20631 21160 21215 21528 23805 23920 25392 25458 26910 27508 31740 33944 34385 35880 38088 38187 41262 42320 42430 43056 47610 50916 53820 55016 55159 61893 63480 63645 67888 68770 71760 76176 76374 82524 84860 95220 97589 101832 103155 107640 110032 110318 123786 126960 127290 137540 152748 165048 165477 169720 190440 190935 195178 203664 206310 215280 220636 247572 254580 275080 275795 292767 305496 309465 330096 330954 339440 380880 381870 390356 412620 441272 487945 495144 496431 509160 550160 551590 585534 610992 618930 661908 763740 780712 825240 827385 878301 882544 975890 990288 992862 1018320 1103180 1171068 1237860 1268657 1323816 1463835 1527480 1561424 1650480 1654770 1756602 1951780 1985724 2206360 2244547 2342136 2475720 2482155 2537314 2647632 2927670 3054960 3309540 3513204 3805971 3903560 3971448 4391505 4412720 4489094 4684272 4951440 4964310 5074628 5855340 6343285 6619080 6733641 7026408 7611942 7807120 7942896 8783010 8978188 9928620 10149256 11222735 11417913 11710680 12686570 13238160 13467282 14052816 15223884 17566020 17956376 19029855 19857240 20200923 20298512 22445470 22835826 23421360 25373140 26934564 29179111 30447768 33668205 35132040 35912752 38059710 39714480 40401846 44890940 45671652 50746280 53869128 57089565 58358222 60895536 67336410 70264080 76119420 80803692 87537333 89781880 91343304 101004615 101492560 107738256 114179130 116716444 134672820 145895555 152238840 161607384 175074666 179563760 182686608 202009230 228358260 233432888 262611999 269345640 291791110 304477680 323214768 350149332 404018460 437686665 456716520 466865776 525223998 538691280 583582220 700298664 808036920 875373330 913433040 1050447996 1167164440 1313059995 1400597328 1616073840 1750746660 2100895992 2334328880 2626119990 3501493320 4201791984 5252239980 7002986640 10504479960 21008959920
• Sum of all divisors σ(n): 79448342064
• Sum of proper divisors (its aliquot sum) s(n): 58439382144
• 21008959920 is an abundant number, because the sum of its proper divisors (58439382144) is greater than itself. Its abundance is 37430422224

Bases of 21008959920

• Binary: 10011100100001110110100100110110000₂
• Hexadecimal: 0x4E43B49B0
• Base-36: 9NG6X80

Squares and roots of 21008959920

• 21008959920 squared (21008959920²) is 441376396920166406400
• 21008959920 cubed (21008959920³) is 9272859032529787471788031488000
• The square root of 21008959920 is 144944.6788260957
• The cube root of 21008959920 is 2759.3164974141

Scales and comparisons

• 21,008,959,920 seconds is equal to 668 years, 1 week, 6 hours, 12 minutes.
• To count from 1 to 21,008,959,920 would take you about one thousand, three hundred thirty-six 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 21008959920 cubic inches would be around 229.9 feet tall.

Recreational maths with 21008959920

• 21008959920 backwards is 02995980012
• 21008959920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21008959920's digits is 45
• More coming soon!