20685990

Names of 20685990

• Cardinal: 20685990 can be written as Twenty million, six hundred eighty-five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.068599 × 10⁷

Factors of 20685990

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 142

Divisors of 20685990

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 10 13 15 26 29 30 31 39 58 59 62 65 78 87 93 118 130 145 155 174 177 186 195 290 295 310 354 377 390 403 435 465 590 754 767 806 870 885 899 930 1131 1209 1534 1711 1770 1798 1829 1885 2015 2262 2301 2418 2697 3422 3658 3770 3835 4030 4495 4602 5133 5394 5487 5655 6045 7670 8555 8990 9145 10266 10974 11310 11505 11687 12090 13485 17110 18290 22243 23010 23374 23777 25665 26970 27435 35061 44486 47554 51330 53041 54870 58435 66729 70122 71331 106082 111215 116870 118885 133458 142662 159123 175305 222430 237770 265205 318246 333645 350610 356655 530410 667290 689533 713310 795615 1379066 1591230 2068599 3447665 4137198 6895330 10342995 20685990
• Sum of all divisors σ(n): 58060800
• Sum of proper divisors (its aliquot sum) s(n): 37374810
• 20685990 is an abundant number, because the sum of its proper divisors (37374810) is greater than itself. Its abundance is 16688820

Bases of 20685990

• Binary: 1001110111010010010100110₂
• Hexadecimal: 0x13BA4A6
• Base-36: CBDEU

Squares and roots of 20685990

• 20685990 squared (20685990²) is 427910182280100
• 20685990 cubed (20685990³) is 8851745751544325799000
• The square root of 20685990 is 4548.1853524235
• The cube root of 20685990 is 274.5103794669

Scales and comparisons

• 20,685,990 seconds is equal to 34 weeks, 1 day, 10 hours, 6 minutes, 30 seconds.
• To count from 1 to 20,685,990 would take you about fifty-one 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 20685990 cubic inches would be around 22.9 feet tall.

Recreational maths with 20685990

• 20685990 backwards is 09958602
• 20685990 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20685990's digits is 39
• More coming soon!