19897143021

Names of 19897143021

• Cardinal: 19897143021 can be written as Nineteen billion, eight hundred ninety-seven million, one hundred forty-three thousand and twenty-one.

Scientific notation

• Scientific notation: 1.9897143021 × 10¹⁰

Factors of 19897143021

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 54998

Divisors of 19897143021

• Number of divisors d(n): 56
• Complete list of divisors:
  1 3 7 9 21 27 63 71 81 189 213 243 497 567 639 729 1491 1701 1917 4473 5103 5751 13419 17253 40257 51759 54917 120771 164751 362313 384419 494253 1153257 1482759 3459771 3899107 4448277 10379313 11697321 13344831 27293749 31137939 35091963 40034493 81881247 93413817 105275889 245643741 280241451 315827667 736931223 947483001 2210793669 2842449003 6632381007 19897143021
• Sum of all divisors σ(n): 34574615424
• Sum of proper divisors (its aliquot sum) s(n): 14677472403
• 19897143021 is a deficient number, because the sum of its proper divisors (14677472403) is less than itself. Its deficiency is 5219670618

Bases of 19897143021

• Binary: 10010100001111101100100111011101101₂
• Hexadecimal: 0x4A1F64EED
• Base-36: 9528TT9

Squares and roots of 19897143021

• 19897143021 squared (19897143021²) is 395896300398129006441
• 19897143021 cubed (19897143021³) is 7877205310506352081965207198261
• The square root of 19897143021 is 141057.2331396019
• The cube root of 19897143021 is 2709.7563367565

Scales and comparisons

• 19,897,143,021 seconds is equal to 632 years, 34 weeks, 5 days, 10 minutes, 21 seconds.
• To count from 1 to 19,897,143,021 would take you about one thousand, two hundred sixty-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 19897143021 cubic inches would be around 225.8 feet tall.

Recreational maths with 19897143021

• 19897143021 backwards is 12034179891
• The number of decimal digits it has is: 11
• The sum of 19897143021's digits is 45
• More coming soon!