21468720

Names of 21468720

• Cardinal: 21468720 can be written as Twenty-one million, four hundred sixty-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.146872 × 10⁷

Factors of 21468720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1013

Divisors of 21468720

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 35 39 40 42 48 52 56 60 65 70 78 80 84 91 104 105 112 120 130 140 156 168 182 195 208 210 240 260 273 280 312 336 364 390 420 455 520 546 560 624 728 780 840 910 983 1040 1092 1365 1456 1560 1680 1820 1966 2184 2730 2949 3120 3640 3932 4368 4915 5460 5898 6881 7280 7864 9830 10920 11796 12779 13762 14745 15728 19660 20643 21840 23592 25558 27524 29490 34405 38337 39320 41286 47184 51116 55048 58980 63895 68810 76674 78640 82572 89453 102232 103215 110096 117960 127790 137620 153348 165144 178906 191685 204464 206430 235920 255580 268359 275240 306696 330288 357812 383370 412860 447265 511160 536718 550480 613392 715624 766740 825720 894530 1022320 1073436 1341795 1431248 1533480 1651440 1789060 2146872 2683590 3066960 3578120 4293744 5367180 7156240 10734360 21468720
• Sum of all divisors σ(n): 81994752
• Sum of proper divisors (its aliquot sum) s(n): 60526032
• 21468720 is an abundant number, because the sum of its proper divisors (60526032) is greater than itself. Its abundance is 39057312

Bases of 21468720

• Binary: 1010001111001011000110000₂
• Hexadecimal: 0x1479630
• Base-36: CS5DC

Squares and roots of 21468720

• 21468720 squared (21468720²) is 460905938438400
• 21468720 cubed (21468720³) is 9895060538671246848000
• The square root of 21468720 is 4633.4350108747
• The cube root of 21468720 is 277.9299721827

Scales and comparisons

• 21,468,720 seconds is equal to 35 weeks, 3 days, 11 hours, 32 minutes.
• To count from 1 to 21,468,720 would take you about seventeen hours!

  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 21468720 cubic inches would be around 23.2 feet tall.

Recreational maths with 21468720

• 21468720 backwards is 02786412
• 21468720 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21468720's digits is 30
• More coming soon!