20445740

Names of 20445740

• Cardinal: 20445740 can be written as Twenty million, four hundred forty-five thousand, seven hundred forty.

Scientific notation

• Scientific notation: 2.044574 × 10⁷

Factors of 20445740

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 718

Divisors of 20445740

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 7 10 14 20 28 31 35 49 62 70 98 124 140 155 196 217 245 310 434 490 620 673 868 980 1085 1346 1519 2170 2692 3038 3365 4340 4711 6076 6730 7595 9422 13460 15190 18844 20863 23555 30380 32977 41726 47110 65954 83452 94220 104315 131908 146041 164885 208630 292082 329770 417260 584164 659540 730205 1022287 1460410 2044574 2920820 4089148 5111435 10222870 20445740
• Sum of all divisors σ(n): 51633792
• Sum of proper divisors (its aliquot sum) s(n): 31188052
• 20445740 is an abundant number, because the sum of its proper divisors (31188052) is greater than itself. Its abundance is 10742312

Bases of 20445740

• Binary: 1001101111111101000101100₂
• Hexadecimal: 0x137FA2C
• Base-36: C6818

Squares and roots of 20445740

• 20445740 squared (20445740²) is 418028284147600
• 20445740 cubed (20445740³) is 8546897610327951224000
• The square root of 20445740 is 4521.6965842479
• The cube root of 20445740 is 273.4435044015

Scales and comparisons

• 20,445,740 seconds is equal to 33 weeks, 5 days, 15 hours, 22 minutes, 20 seconds.
• To count from 1 to 20,445,740 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 20445740 cubic inches would be around 22.8 feet tall.

Recreational maths with 20445740

• 20445740 backwards is 04754402
• The number of decimal digits it has is: 8
• The sum of 20445740's digits is 26
• More coming soon!