21428799639639

Names of 21428799639639

• Cardinal: 21428799639639 can be written as Twenty-one trillion, four hundred twenty-eight billion, seven hundred ninety-nine million, six hundred thirty-nine thousand, six hundred thirty-nine.

Scientific notation

• Scientific notation: 2.1428799639639 × 10¹³

Factors of 21428799639639

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 265560

Divisors of 21428799639639

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 7 19 21 57 73 133 219 399 511 1387 1533 2801 4161 8403 9709 19607 29127 53219 58821 159657 204473 262657 372533 613419 787971 1117599 1431311 1838599 3884987 4293933 4990483 5515797 11654961 14971449 19173961 27194909 34933381 57521883 81584727 104800143 134217727 364305259 402653181 735702257 1092915777 2207106771 2550136813 5149915799 7650410439 13978342883 15449747397 41935028649 53706264761 97848400181 161118794283 293545200543 375943853327 1020419030459 1127831559981 3061257091377 7142933213213 21428799639639
• Sum of all divisors σ(n): 34855431029760
• Sum of proper divisors (its aliquot sum) s(n): 13426631390121
• 21428799639639 is a deficient number, because the sum of its proper divisors (13426631390121) is less than itself. Its deficiency is 8002168249518

Bases of 21428799639639

• Binary: 100110111110101000111111111011001000001010111₂
• Hexadecimal: 0x137D47FD9057
• Base-36: 7LG96136F

Squares and roots of 21428799639639

• 21428799639639 squared (21428799639639²) is 459193453995792536260050321
• 21428799639639 cubed (21428799639639³) is 9839964521509626825631572159436806274119
• The square root of 21428799639639 is 4629125.1484096863
• The cube root of 21428799639639 is 27775.7598162479

Scales and comparisons

• 21,428,799,639,639 seconds is equal to 681,369 years, 28 weeks, 2 days, 8 hours, 20 minutes, 39 seconds.
• To count from 1 to 21,428,799,639,639 would take you about one million, seven hundred three thousand, four hundred twenty-three 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 21428799639639 cubic inches would be around 2314.6 feet tall.

Recreational maths with 21428799639639

• 21428799639639 backwards is 93693699782412
• The number of decimal digits it has is: 14
• The sum of 21428799639639's digits is 78
• More coming soon!