21320640

Names of 21320640

• Cardinal: 21320640 can be written as Twenty-one million, three hundred twenty thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.132064 × 10⁷

Factors of 21320640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 694

Divisors of 21320640

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 32 33 36 40 44 45 48 55 60 64 66 72 80 88 90 96 99 110 120 132 144 160 165 176 180 192 198 220 240 264 288 320 330 352 360 396 440 480 495 528 576 660 673 704 720 792 880 960 990 1056 1320 1346 1440 1584 1760 1980 2019 2112 2640 2692 2880 3168 3365 3520 3960 4038 5280 5384 6057 6336 6730 7403 7920 8076 10095 10560 10768 12114 13460 14806 15840 16152 20190 21536 22209 24228 26920 29612 30285 31680 32304 37015 40380 43072 44418 48456 53840 59224 60570 64608 66627 74030 80760 88836 96912 107680 111045 118448 121140 129216 133254 148060 161520 177672 193824 215360 222090 236896 242280 266508 296120 323040 333135 355344 387648 444180 473792 484560 533016 592240 646080 666270 710688 888360 969120 1066032 1184480 1332540 1421376 1776720 1938240 2132064 2368960 2665080 3553440 4264128 5330160 7106880 10660320 21320640
• Sum of all divisors σ(n): 80119728
• Sum of proper divisors (its aliquot sum) s(n): 58799088
• 21320640 is an abundant number, because the sum of its proper divisors (58799088) is greater than itself. Its abundance is 37478448

Bases of 21320640

• Binary: 1010001010101001111000000₂
• Hexadecimal: 0x14553C0
• Base-36: COZ40

Squares and roots of 21320640

• 21320640 squared (21320640²) is 454569690009600
• 21320640 cubed (21320640³) is 9691716715606278144000
• The square root of 21320640 is 4617.4278554191
• The cube root of 21320640 is 277.2894921657

Scales and comparisons

• 21,320,640 seconds is equal to 35 weeks, 1 day, 18 hours, 24 minutes.
• To count from 1 to 21,320,640 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 21320640 cubic inches would be around 23.1 feet tall.

Recreational maths with 21320640

• 21320640 backwards is 04602312
• 21320640 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21320640's digits is 18
• More coming soon!