21400939890

Names of 21400939890

• Cardinal: 21400939890 can be written as Twenty-one billion, four hundred million, nine hundred thirty-nine thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 2.140093989 × 10¹⁰

Factors of 21400939890

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 21617132

Divisors of 21400939890

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 5 6 9 10 11 15 18 22 30 33 45 55 66 90 99 110 165 198 330 495 990 21617111 43234222 64851333 108085555 129702666 194553999 216171110 237788221 324256665 389107998 475576442 648513330 713364663 972769995 1188941105 1426729326 1945539990 2140093989 2377882210 3566823315 4280187978 7133646630 10700469945 21400939890
• Sum of all divisors σ(n): 60700850496
• Sum of proper divisors (its aliquot sum) s(n): 39299910606
• 21400939890 is an abundant number, because the sum of its proper divisors (39299910606) is greater than itself. Its abundance is 17898970716

Bases of 21400939890

• Binary: 10011111011100110000110110101110010₂
• Hexadecimal: 0x4FB986D72
• Base-36: 9TXKEWI

Squares and roots of 21400939890

• 21400939890 squared (21400939890²) is 458000228175393212100
• 21400939890 cubed (21400939890³) is 9801635352787874509266120669000
• The square root of 21400939890 is 146290.6008258901
• The cube root of 21400939890 is 2776.3717435243

Scales and comparisons

• 21,400,939,890 seconds is equal to 680 years, 25 weeks, 1 day, 1 hour, 31 minutes, 30 seconds.
• To count from 1 to 21,400,939,890 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 21400939890 cubic inches would be around 231.4 feet tall.

Recreational maths with 21400939890

• 21400939890 backwards is 09893900412
• 21400939890 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21400939890's digits is 45
• More coming soon!