20445990

Names of 20445990

• Cardinal: 20445990 can be written as Twenty million, four hundred forty-five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.044599 × 10⁷

Factors of 20445990

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 8716

Divisors of 20445990

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 5 6 10 15 30 79 158 237 395 474 790 1185 2370 8627 17254 25881 43135 51762 86270 129405 258810 681533 1363066 2044599 3407665 4089198 6815330 10222995 20445990
• Sum of all divisors σ(n): 49697280
• Sum of proper divisors (its aliquot sum) s(n): 29251290
• 20445990 is an abundant number, because the sum of its proper divisors (29251290) is greater than itself. Its abundance is 8805300

Bases of 20445990

• Binary: 1001101111111101100100110₂
• Hexadecimal: 0x137FB26
• Base-36: C6886

Squares and roots of 20445990

• 20445990 squared (20445990²) is 418038507080100
• 20445990 cubed (20445990³) is 8547211135374653799000
• The square root of 20445990 is 4521.7242286543
• The cube root of 20445990 is 273.4446189059

Scales and comparisons

• 20,445,990 seconds is equal to 33 weeks, 5 days, 15 hours, 26 minutes, 30 seconds.
• To count from 1 to 20,445,990 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 20445990 cubic inches would be around 22.8 feet tall.

Recreational maths with 20445990

• 20445990 backwards is 09954402
• The number of decimal digits it has is: 8
• The sum of 20445990's digits is 33
• More coming soon!