21397251843

Names of 21397251843

• Cardinal: 21397251843 can be written as Twenty-one billion, three hundred ninety-seven million, two hundred fifty-one thousand, eight hundred forty-three.

Scientific notation

• Scientific notation: 2.1397251843 × 10¹⁰

Factors of 21397251843

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 588

Divisors of 21397251843

• Number of divisors d(n): 60
• Complete list of divisors:
  1 3 9 11 27 33 81 99 113 297 339 461 891 1017 1243 1383 3051 3729 4149 5071 9153 11187 12447 15213 33561 37341 45639 52093 100683 136917 156279 212521 410751 468837 573023 637563 1406511 1719069 1912689 2337731 4219533 5157207 5738067 7013193 15471621 17214201 21039579 24014873 46414863 63118737 72044619 189356211 216133857 264163603 648401571 792490809 1945204713 2377472427 7132417281 21397251843
• Sum of all divisors σ(n): 35254650024
• Sum of proper divisors (its aliquot sum) s(n): 13857398181
• 21397251843 is a deficient number, because the sum of its proper divisors (13857398181) is less than itself. Its deficiency is 7539853662

Bases of 21397251843

• Binary: 10011111011011000000010011100000011₂
• Hexadecimal: 0x4FB602703
• Base-36: 9TVDD6R

Squares and roots of 21397251843

• 21397251843 squared (21397251843²) is 457842386432766896649
• 21397251843 cubed (21397251843³) is 9796568846902039674912205774107
• The square root of 21397251843 is 146277.9950744473
• The cube root of 21397251843 is 2776.2122493187

Scales and comparisons

• 21,397,251,843 seconds is equal to 680 years, 19 weeks, 9 hours, 4 minutes, 3 seconds.
• To count from 1 to 21,397,251,843 would take you about one thousand, three hundred sixty 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 21397251843 cubic inches would be around 231.4 feet tall.

Recreational maths with 21397251843

• 21397251843 backwards is 34815279312
• The number of decimal digits it has is: 11
• The sum of 21397251843's digits is 45
• More coming soon!