20397138

Names of 20397138

• Cardinal: 20397138 can be written as Twenty million, three hundred ninety-seven thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 2.0397138 × 10⁷

Factors of 20397138

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 842

Divisors of 20397138

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 6 37 74 111 139 222 278 417 661 834 1322 1983 3966 5143 10286 15429 24457 30858 48914 73371 91879 146742 183758 275637 551274 3399523 6799046 10198569 20397138
• Sum of all divisors σ(n): 42262080
• Sum of proper divisors (its aliquot sum) s(n): 21864942
• 20397138 is an abundant number, because the sum of its proper divisors (21864942) is greater than itself. Its abundance is 1467804

Bases of 20397138

• Binary: 1001101110011110001010010₂
• Hexadecimal: 0x1373C52
• Base-36: C56J6

Squares and roots of 20397138

• 20397138 squared (20397138²) is 416043238591044
• 20397138 cubed (20397138³) is 8486091351508450032072
• The square root of 20397138 is 4516.3190764161
• The cube root of 20397138 is 273.2266630497

Scales and comparisons

• 20,397,138 seconds is equal to 33 weeks, 5 days, 1 hour, 52 minutes, 18 seconds.
• To count from 1 to 20,397,138 would take you about fifty 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 20397138 cubic inches would be around 22.8 feet tall.

Recreational maths with 20397138

• 20397138 backwards is 83179302
• The number of decimal digits it has is: 8
• The sum of 20397138's digits is 33
• More coming soon!