21385650

Names of 21385650

• Cardinal: 21385650 can be written as Twenty-one million, three hundred eighty-five thousand, six hundred fifty.

Scientific notation

• Scientific notation: 2.138565 × 10⁷

Factors of 21385650

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1031

Divisors of 21385650

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 10 11 13 15 22 25 26 30 33 39 50 55 65 66 75 78 110 130 143 150 165 195 275 286 325 330 390 429 550 650 715 825 858 975 997 1430 1650 1950 1994 2145 2991 3575 4290 4985 5982 7150 9970 10725 10967 12961 14955 21450 21934 24925 25922 29910 32901 38883 49850 54835 64805 65802 74775 77766 109670 129610 142571 149550 164505 194415 274175 285142 324025 329010 388830 427713 548350 648050 712855 822525 855426 972075 1425710 1645050 1944150 2138565 3564275 4277130 7128550 10692825 21385650
• Sum of all divisors σ(n): 62371008
• Sum of proper divisors (its aliquot sum) s(n): 40985358
• 21385650 is an abundant number, because the sum of its proper divisors (40985358) is greater than itself. Its abundance is 19599708

Bases of 21385650

• Binary: 1010001100101000110110010₂
• Hexadecimal: 0x14651B2
• Base-36: CQD9U

Squares and roots of 21385650

• 21385650 squared (21385650²) is 457346025922500
• 21385650 cubed (21385650³) is 9780642039269512125000
• The square root of 21385650 is 4624.4621308861
• The cube root of 21385650 is 277.5710393565

Scales and comparisons

• 21,385,650 seconds is equal to 35 weeks, 2 days, 12 hours, 27 minutes, 30 seconds.
• To count from 1 to 21,385,650 would take you about six hours!

  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 21385650 cubic inches would be around 23.1 feet tall.

Recreational maths with 21385650

• 21385650 backwards is 05658312
• 21385650 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21385650's digits is 30
• More coming soon!