21936138

Names of 21936138

• Cardinal: 21936138 can be written as Twenty-one million, nine hundred thirty-six thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 2.1936138 × 10⁷

Factors of 21936138

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 522301

Divisors of 21936138

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 6 7 14 21 42 522289 1044578 1566867 3133734 3656023 7312046 10968069 21936138
• Sum of all divisors σ(n): 50139840
• Sum of proper divisors (its aliquot sum) s(n): 28203702
• 21936138 is an abundant number, because the sum of its proper divisors (28203702) is greater than itself. Its abundance is 6267564

Bases of 21936138

• Binary: 1010011101011100000001010₂
• Hexadecimal: 0x14EB80A
• Base-36: D2616

Squares and roots of 21936138

• 21936138 squared (21936138²) is 481194150355044
• 21936138 cubed (21936138³) is 10555541286980994180072
• The square root of 21936138 is 4683.6031001783
• The cube root of 21936138 is 279.9325432737

Scales and comparisons

• 21,936,138 seconds is equal to 36 weeks, 1 day, 21 hours, 22 minutes, 18 seconds.
• To count from 1 to 21,936,138 would take you about two weeks!

  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 21936138 cubic inches would be around 23.3 feet tall.

Recreational maths with 21936138

• 21936138 backwards is 83163912
• The number of decimal digits it has is: 8
• The sum of 21936138's digits is 33
• More coming soon!