20420785
20,420,785 is an odd composite number composed of six prime numbers multiplied together.
20420785 is an odd composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 20420785:
5 × 7 × 11 × 29 × 31 × 59
See below for interesting mathematical facts about the number 20420785 from the Numbermatics database.
Names of 20420785
- Cardinal: 20420785 can be written as Twenty million, four hundred twenty thousand, seven hundred eighty-five.
Scientific notation
- Scientific notation: 2.0420785 × 107
Factors of 20420785
Divisors of 20420785
- Number of divisors d(n): 64
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Complete list of divisors:
1 5 7 11 29 31 35 55 59 77 145 155 203 217 295 319 341 385 413 649 899 1015 1085 1595 1705 1711 1829 2065 2233 2387 3245 4495 4543 6293 8555 9145 9889 11165 11935 11977 12803 18821 20119 22715 31465 49445 53041 59885 64015 69223 94105 100595 131747 140833 265205 346115 371287 583451 658735 704165 1856435 2917255 4084157 20420785
- Sum of all divisors σ(n): 33177600
- Sum of proper divisors (its aliquot sum) s(n): 12756815
- 20420785 is a deficient number, because the sum of its proper divisors (12756815) is less than itself. Its deficiency is 7663970
Bases of 20420785
- Binary: 10011011110011000101100012
- Hexadecimal: 0x13798B1
- Base-36: C5OS1
Squares and roots of 20420785
- 20420785 squared (204207852) is 417008460016225
- 20420785 cubed (204207853) is 8515640105172427236625
-
The
square root of 20420785 is 4518.9362686367 -
The
cube root of 20420785 is 273.3322088327
Scales and comparisons
How big is 20420785?- 20,420,785 seconds is equal to 33 weeks, 5 days, 8 hours, 26 minutes, 25 seconds.
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To count from 1 to 20,420,785 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 20420785 cubic inches would be around 22.8 feet tall.
Recreational maths with 20420785
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The information we have on file for 20420785 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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