21015703125

Names of 21015703125

• Cardinal: 21015703125 can be written as Twenty-one billion, fifteen million, seven hundred three thousand, one hundred twenty-five.

Scientific notation

• Scientific notation: 2.1015703125 × 10¹⁰

Factors of 21015703125

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 49

Divisors of 21015703125

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 9 15 25 27 41 45 75 81 123 125 135 205 225 243 369 375 405 615 625 675 729 1025 1107 1125 1215 1845 1875 2025 2187 3075 3125 3321 3375 3645 5125 5535 5625 6075 6561 9225 9375 9963 10125 10935 15375 15625 16605 16875 18225 25625 27675 28125 29889 30375 32805 46125 46875 49815 50625 54675 76875 78125 83025 84375 89667 91125 128125 138375 140625 149445 151875 164025 230625 234375 249075 253125 269001 273375 384375 415125 421875 448335 455625 640625 691875 703125 747225 759375 820125 1153125 1245375 1265625 1345005 1366875 1921875 2075625 2109375 2241675 2278125 3203125 3459375 3736125 3796875 4100625 5765625 6226875 6328125 6725025 6834375 9609375 10378125 11208375 11390625 17296875 18680625 18984375 20503125 28828125 31134375 33625125 34171875 51890625 56041875 56953125 86484375 93403125 102515625 155671875 168125625 170859375 259453125 280209375 467015625 512578125 778359375 840628125 1401046875 2335078125 4203140625 7005234375 21015703125
• Sum of all divisors σ(n): 40363373232
• Sum of proper divisors (its aliquot sum) s(n): 19347670107
• 21015703125 is a deficient number, because the sum of its proper divisors (19347670107) is less than itself. Its deficiency is 1668033018

Bases of 21015703125

• Binary: 10011100100101000100010111001010101₂
• Hexadecimal: 0x4E4A22E55
• Base-36: 9NK7GB9

Squares and roots of 21015703125

• 21015703125 squared (21015703125²) is 441659777838134765625
• 21015703125 cubed (21015703125³) is 9281790773299694538116455078125
• The square root of 21015703125 is 144967.9382656731
• The cube root of 21015703125 is 2759.6116833175

Scales and comparisons

• 21,015,703,125 seconds is equal to 668 years, 12 weeks, 1 day, 7 hours, 18 minutes, 45 seconds.
• To count from 1 to 21,015,703,125 would take you about one thousand, three hundred thirty-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 21015703125 cubic inches would be around 230 feet tall.

Recreational maths with 21015703125

• 21015703125 backwards is 52130751012
• 21015703125 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21015703125's digits is 27
• More coming soon!