21315213810905

Names of 21315213810905

• Cardinal: 21315213810905 can be written as Twenty-one trillion, three hundred fifteen billion, two hundred thirteen million, eight hundred ten thousand, nine hundred five.

Scientific notation

• Scientific notation: 2.1315213810905 × 10¹³

Factors of 21315213810905

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 620

Divisors of 21315213810905

• Number of divisors d(n): 48
• Complete list of divisors:
  1 5 7 35 61 305 427 547 2135 2735 3721 3829 18605 19145 26047 33367 130235 166835 233569 299209 1167845 1496045 2035387 2094463 10176935 10472315 14247709 18251749 71238545 91258745 127762243 163667323 638811215 818336615 1113356689 1145671261 5566783445 5728356305 7793496823 9983706703 38967484115 49918533515 69885946921 349429734605 609006108883 3045030544415 4263042762181 21315213810905
• Sum of all divisors σ(n): 29773798254720
• Sum of proper divisors (its aliquot sum) s(n): 8458584443815
• 21315213810905 is a deficient number, because the sum of its proper divisors (8458584443815) is less than itself. Its deficiency is 12856629367090

Bases of 21315213810905

• Binary: 100110110001011010101101111110101110011011001₂
• Hexadecimal: 0x1362D5BF5CD9
• Base-36: 7K02NYKT5

Squares and roots of 21315213810905

• 21315213810905 squared (21315213810905²) is 454338339804595253096919025
• 21315213810905 cubed (21315213810905³) is 9684318855426557637795052374184446967625
• The square root of 21315213810905 is 4616840.2409987071
• The cube root of 21315213810905 is 27726.5966404299

Scales and comparisons

• 21,315,213,810,905 seconds is equal to 677,757 years, 45 weeks, 13 hours, 15 minutes, 5 seconds.
• To count from 1 to 21,315,213,810,905 would take you about one million, six hundred ninety-four thousand, three hundred ninety-four 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 21315213810905 cubic inches would be around 2310.5 feet tall.

Recreational maths with 21315213810905

• 21315213810905 backwards is 50901831251312
• The number of decimal digits it has is: 14
• The sum of 21315213810905's digits is 41
• More coming soon!