21329490

Names of 21329490

• Cardinal: 21329490 can be written as Twenty-one million, three hundred twenty-nine thousand, four hundred ninety.

Scientific notation

• Scientific notation: 2.132949 × 10⁷

Factors of 21329490

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 631

Divisors of 21329490

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 7 10 13 14 15 21 26 30 35 39 42 65 70 78 91 105 130 169 182 195 210 273 338 390 455 507 546 601 845 910 1014 1183 1202 1365 1690 1803 2366 2535 2730 3005 3549 3606 4207 5070 5915 6010 7098 7813 8414 9015 11830 12621 15626 17745 18030 21035 23439 25242 35490 39065 42070 46878 54691 63105 78130 101569 109382 117195 126210 164073 203138 234390 273455 304707 328146 507845 546910 609414 710983 820365 1015690 1421966 1523535 1640730 2132949 3047070 3554915 4265898 7109830 10664745 21329490
• Sum of all divisors σ(n): 63455616
• Sum of proper divisors (its aliquot sum) s(n): 42126126
• 21329490 is an abundant number, because the sum of its proper divisors (42126126) is greater than itself. Its abundance is 20796636

Bases of 21329490

• Binary: 1010001010111011001010010₂
• Hexadecimal: 0x1457652
• Base-36: CP5XU

Squares and roots of 21329490

• 21329490 squared (21329490²) is 454947143660100
• 21329490 cubed (21329490³) is 9703790551226666349000
• The square root of 21329490 is 4618.3860817389
• The cube root of 21329490 is 277.3278536243

Scales and comparisons

• 21,329,490 seconds is equal to 35 weeks, 1 day, 20 hours, 51 minutes, 30 seconds.
• To count from 1 to 21,329,490 would take you about six days!

  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 21329490 cubic inches would be around 23.1 feet tall.

Recreational maths with 21329490

• 21329490 backwards is 09492312
• 21329490 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21329490's digits is 30
• More coming soon!