21493680

Names of 21493680

• Cardinal: 21493680 can be written as Twenty-one million, four hundred ninety-three thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.149368 × 10⁷

Factors of 21493680

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 106

Divisors of 21493680

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 39 40 48 52 60 65 78 80 83 104 120 130 156 166 195 208 240 249 260 312 332 390 415 498 520 624 664 780 830 996 1040 1079 1245 1328 1560 1660 1992 2158 2490 3120 3237 3320 3984 4316 4980 5395 6474 6640 6889 8632 9960 10790 12948 13778 16185 17264 19920 20667 21580 25896 27556 32370 34445 41334 43160 51792 55112 64740 68890 82668 86320 89557 103335 110224 129480 137780 165336 179114 206670 258960 268671 275560 330672 358228 413340 447785 537342 551120 716456 826680 895570 1074684 1343355 1432912 1653360 1791140 2149368 2686710 3582280 4298736 5373420 7164560 10746840 21493680
• Sum of all divisors σ(n): 72630768
• Sum of proper divisors (its aliquot sum) s(n): 51137088
• 21493680 is an abundant number, because the sum of its proper divisors (51137088) is greater than itself. Its abundance is 29643408

Bases of 21493680

• Binary: 1010001111111011110110000₂
• Hexadecimal: 0x147F7B0
• Base-36: CSOMO

Squares and roots of 21493680

• 21493680 squared (21493680²) is 461978279942400
• 21493680 cubed (21493680³) is 9929613316032364032000
• The square root of 21493680 is 4636.1276945313
• The cube root of 21493680 is 278.0376396079

Scales and comparisons

• 21,493,680 seconds is equal to 35 weeks, 3 days, 18 hours, 28 minutes.
• To count from 1 to 21,493,680 would take you about two days!

  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 21493680 cubic inches would be around 23.2 feet tall.

Recreational maths with 21493680

• 21493680 backwards is 08639412
• The number of decimal digits it has is: 8
• The sum of 21493680's digits is 33
• More coming soon!