21309832381

Names of 21309832381

• Cardinal: 21309832381 can be written as Twenty-one billion, three hundred nine million, eight hundred thirty-two thousand, three hundred eighty-one.

Scientific notation

• Scientific notation: 2.1309832381 × 10¹⁰

Factors of 21309832381

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 88422782

Divisors of 21309832381

• Number of divisors d(n): 4
• Complete list of divisors:
  1 241 88422541 21309832381
• Sum of all divisors σ(n): 21398255164
• Sum of proper divisors (its aliquot sum) s(n): 88422783
• 21309832381 is a deficient number, because the sum of its proper divisors (88422783) is less than itself. Its deficiency is 21221409598

Bases of 21309832381

• Binary: 10011110110001010100011110010111101₂
• Hexadecimal: 0x4F62A3CBD
• Base-36: 9SFBNWD

Squares and roots of 21309832381

• 21309832381 squared (21309832381²) is 454108956106316129161
• 21309832381 cubed (21309832381³) is 9676985737336483127817656162341
• The square root of 21309832381 is 145978.8764890317
• The cube root of 21309832381 is 2772.4263075677

Scales and comparisons

• 21,309,832,381 seconds is equal to 677 years, 30 weeks, 3 days, 13 hours, 53 minutes, 1 second.
• To count from 1 to 21,309,832,381 would take you about one thousand, three hundred fifty-five 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 21309832381 cubic inches would be around 231 feet tall.

Recreational maths with 21309832381

• 21309832381 backwards is 18323890312
• The number of decimal digits it has is: 11
• The sum of 21309832381's digits is 40
• More coming soon!