21493428208

Names of 21493428208

• Cardinal: 21493428208 can be written as Twenty-one billion, four hundred ninety-three million, four hundred twenty-eight thousand, two hundred eight.

Scientific notation

• Scientific notation: 2.1493428208 × 10¹⁰

Factors of 21493428208

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1988

Divisors of 21493428208

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 4 7 8 14 16 28 49 56 98 112 196 343 392 686 784 1372 1979 2744 3958 5488 7916 13853 15832 27706 31664 55412 96971 110824 193942 221648 387884 678797 775768 1357594 1551536 2715188 3916441 5430376 7832882 10860752 15665764 27415087 31331528 54830174 62663056 109660348 191905609 219320696 383811218 438641392 767622436 1343339263 1535244872 2686678526 3070489744 5373357052 10746714104 21493428208
• Sum of all divisors σ(n): 48588420400
• Sum of proper divisors (its aliquot sum) s(n): 27094992192
• 21493428208 is an abundant number, because the sum of its proper divisors (27094992192) is greater than itself. Its abundance is 5601563984

Bases of 21493428208

• Binary: 10100000001000110111010111111110000₂
• Hexadecimal: 0x5011BAFF0
• Base-36: 9VGMRCG

Squares and roots of 21493428208

• 21493428208 squared (21493428208²) is 461967456132450091264
• 21493428208 cubed (21493428208³) is 9929264352815205375725831974912
• The square root of 21493428208 is 146606.3716487111
• The cube root of 21493428208 is 2780.3655389461

Scales and comparisons

• 21,493,428,208 seconds is equal to 683 years, 22 weeks, 12 hours, 43 minutes, 28 seconds.
• To count from 1 to 21,493,428,208 would take you about one thousand, three hundred sixty-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 21493428208 cubic inches would be around 231.7 feet tall.

Recreational maths with 21493428208

• 21493428208 backwards is 80282439412
• The number of decimal digits it has is: 11
• The sum of 21493428208's digits is 43
• More coming soon!