21381537944

Names of 21381537944

• Cardinal: 21381537944 can be written as Twenty-one billion, three hundred eighty-one million, five hundred thirty-seven thousand, nine hundred forty-four.

Scientific notation

• Scientific notation: 2.1381537944 × 10¹⁰

Factors of 21381537944

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 353

Divisors of 21381537944

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 8 13 26 52 67 104 134 169 268 271 338 536 542 676 871 1084 1352 1742 2168 2197 3484 3523 4394 4489 6968 7046 8788 8978 11323 14092 17576 17956 18157 22646 28184 35912 36314 45292 45799 58357 72628 90584 91598 116714 145256 147199 183196 233428 236041 294398 366392 466856 472082 588796 595387 758641 944164 1177592 1190774 1216519 1517282 1888328 2381548 2433038 3034564 3068533 4763096 4866076 6069128 6137066 9732152 9862333 12274132 15814747 19724666 24548264 31629494 39449332 39890929 63258988 78898664 79781858 126517976 159563716 205591711 319127432 411183422 822366844 1644733688 2672692243 5345384486 10690768972 21381537944
• Sum of all divisors σ(n): 44250292800
• Sum of proper divisors (its aliquot sum) s(n): 22868754856
• 21381537944 is an abundant number, because the sum of its proper divisors (22868754856) is greater than itself. Its abundance is 1487216912

Bases of 21381537944

• Binary: 10011111010011100000110000010011000₂
• Hexadecimal: 0x4FA706098
• Base-36: 9TM0K9K

Squares and roots of 21381537944

• 21381537944 squared (21381537944²) is 457170164850711747136
• 21381537944 cubed (21381537944³) is 9775001226620228316794917328384
• The square root of 21381537944 is 146224.2727593473
• The cube root of 21381537944 is 2775.5324766259

Scales and comparisons

• 21,381,537,944 seconds is equal to 679 years, 45 weeks, 12 hours, 5 minutes, 44 seconds.
• To count from 1 to 21,381,537,944 would take you about one thousand, three hundred fifty-nine 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 21381537944 cubic inches would be around 231.3 feet tall.

Recreational maths with 21381537944

• 21381537944 backwards is 44973518312
• The number of decimal digits it has is: 11
• The sum of 21381537944's digits is 47
• More coming soon!