21731747128

Names of 21731747128

• Cardinal: 21731747128 can be written as Twenty-one billion, seven hundred thirty-one million, seven hundred forty-seven thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1731747128 × 10¹⁰

Factors of 21731747128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 54172

Divisors of 21731747128

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 52 56 91 104 182 364 557 728 1114 2228 3899 4456 7241 7798 14482 15596 28964 31192 50687 53593 57928 101374 107186 202748 214372 375151 405496 428744 696709 750302 1393418 1500604 2786836 3001208 4876963 5573672 9753926 19507852 29851301 39015704 59702602 119405204 208959107 238810408 388066913 417918214 776133826 835836428 1552267652 1671672856 2716468391 3104535304 5432936782 10865873564 21731747128
• Sum of all divisors σ(n): 50241159360
• Sum of proper divisors (its aliquot sum) s(n): 28509412232
• 21731747128 is an abundant number, because the sum of its proper divisors (28509412232) is greater than itself. Its abundance is 6777665104

Bases of 21731747128

• Binary: 10100001111010100000010010100111000₂
• Hexadecimal: 0x50F502538
• Base-36: 9ZEIREG

Squares and roots of 21731747128

• 21731747128 squared (21731747128²) is 472268833235336248384
• 21731747128 cubed (21731747128³) is 10263226860305929463933286641152
• The square root of 21731747128 is 147416.9160171247
• The cube root of 21731747128 is 2790.6040122021

Scales and comparisons

• 21,731,747,128 seconds is equal to 691 years, 20 hours, 25 minutes, 28 seconds.
• To count from 1 to 21,731,747,128 would take you about one thousand, three hundred eighty-two 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 21731747128 cubic inches would be around 232.6 feet tall.

Recreational maths with 21731747128

• 21731747128 backwards is 82174713712
• The number of decimal digits it has is: 11
• The sum of 21731747128's digits is 43
• More coming soon!