21001731481

Names of 21001731481

• Cardinal: 21001731481 can be written as Twenty-one billion, one million, seven hundred thirty-one thousand, four hundred eighty-one.

Scientific notation

• Scientific notation: 2.1001731481 × 10¹⁰

Factors of 21001731481

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 547018

Divisors of 21001731481

• Number of divisors d(n): 4
• Complete list of divisors:
  1 41549 505469 21001731481
• Sum of all divisors σ(n): 21002278500
• Sum of proper divisors (its aliquot sum) s(n): 547019
• 21001731481 is a deficient number, because the sum of its proper divisors (547019) is less than itself. Its deficiency is 21001184462

Bases of 21001731481

• Binary: 10011100011110011001111110110011001₂
• Hexadecimal: 0x4E3CCFD99
• Base-36: 9NBVZQ1

Squares and roots of 21001731481

• 21001731481 squared (21001731481²) is 441072725200026453361
• 21001731481 cubed (21001731481³) is 9263290938243857587584491957641
• The square root of 21001731481 is 144919.7415157783
• The cube root of 21001731481 is 2759.0000000875

Scales and comparisons

• 21,001,731,481 seconds is equal to 667 years, 41 weeks, 14 hours, 18 minutes, 1 second.
• To count from 1 to 21,001,731,481 would take you about one thousand, three hundred thirty-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 21001731481 cubic inches would be around 229.9 feet tall.

Recreational maths with 21001731481

• 21001731481 backwards is 18413710012
• The number of decimal digits it has is: 11
• The sum of 21001731481's digits is 28
• More coming soon!