21240380920

Names of 21240380920

• Cardinal: 21240380920 can be written as Twenty-one billion, two hundred forty million, three hundred eighty thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.124038092 × 10¹⁰

Factors of 21240380920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2305

Divisors of 21240380920

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 11 20 22 40 44 55 88 109 110 218 220 227 436 440 454 545 872 908 1090 1135 1199 1816 1951 2180 2270 2398 2497 3902 4360 4540 4796 4994 5995 7804 9080 9592 9755 9988 11990 12485 15608 19510 19976 21461 23980 24743 24970 39020 42922 47960 49486 49940 78040 85844 98972 99880 107305 123715 171688 197944 212659 214610 247430 272173 425318 429220 442877 494860 544346 850636 858440 885754 989720 1063295 1088692 1360865 1701272 1771508 2126590 2177384 2214385 2339249 2721730 3543016 4253180 4428770 4678498 4871647 5443460 8506360 8857540 9356996 9743294 10886920 11696245 17715080 18713992 19486588 23392490 24358235 38973176 46784980 48273593 48716470 93569960 96547186 97432940 193094372 194865880 241367965 386188744 482735930 531009523 965471860 1062019046 1930943720 2124038092 2655047615 4248076184 5310095230 10620190460 21240380920
• Sum of all divisors σ(n): 52872652800
• Sum of proper divisors (its aliquot sum) s(n): 31632271880
• 21240380920 is an abundant number, because the sum of its proper divisors (31632271880) is greater than itself. Its abundance is 10391890960

Bases of 21240380920

• Binary: 10011110010000001100111110111111000₂
• Hexadecimal: 0x4F2067DF8
• Base-36: 9R9Z2T4

Squares and roots of 21240380920

• 21240380920 squared (21240380920²) is 451153781626700046400
• 21240380920 cubed (21240380920³) is 9582678175249606228117674688000
• The square root of 21240380920 is 145740.8004643861
• The cube root of 21240380920 is 2769.4111326265

Scales and comparisons

• 21,240,380,920 seconds is equal to 675 years, 19 weeks, 4 days, 17 hours, 48 minutes, 40 seconds.
• To count from 1 to 21,240,380,920 would take you about one thousand, three hundred fifty 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 21240380920 cubic inches would be around 230.8 feet tall.

Recreational maths with 21240380920

• 21240380920 backwards is 02908304212
• The number of decimal digits it has is: 11
• The sum of 21240380920's digits is 31
• More coming soon!