21380814

Names of 21380814

• Cardinal: 21380814 can be written as Twenty-one million, three hundred eighty thousand, eight hundred fourteen.

Scientific notation

• Scientific notation: 2.1380814 × 10⁷

Factors of 21380814

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 273

Divisors of 21380814

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 7 9 13 14 18 19 21 26 27 38 39 42 54 57 63 78 91 114 117 126 133 171 182 189 229 234 247 266 273 342 351 378 399 458 494 513 546 687 702 741 798 819 1026 1197 1374 1482 1603 1638 1729 2061 2223 2394 2457 2977 3206 3458 3591 4122 4351 4446 4809 4914 5187 5954 6183 6669 7182 8702 8931 9618 10374 12366 13053 13338 14427 15561 17862 20839 26106 26793 28854 30457 31122 39159 41678 43281 46683 53586 56563 60914 62517 78318 80379 86562 91371 93366 113126 117477 125034 160758 169689 182742 187551 234954 274113 339378 375102 395941 509067 548226 562653 791882 822339 1018134 1125306 1187823 1527201 1644678 2375646 3054402 3563469 7126938 10690407 21380814
• Sum of all divisors σ(n): 61824000
• Sum of proper divisors (its aliquot sum) s(n): 40443186
• 21380814 is an abundant number, because the sum of its proper divisors (40443186) is greater than itself. Its abundance is 19062372

Bases of 21380814

• Binary: 1010001100011111011001110₂
• Hexadecimal: 0x1463ECE
• Base-36: CQ9JI

Squares and roots of 21380814

• 21380814 squared (21380814²) is 457139207302596
• 21380814 cubed (21380814³) is 9774008363444246793144
• The square root of 21380814 is 4623.9392297043
• The cube root of 21380814 is 277.5501151271

Scales and comparisons

• 21,380,814 seconds is equal to 35 weeks, 2 days, 11 hours, 6 minutes, 54 seconds.
• To count from 1 to 21,380,814 would take you about four 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 21380814 cubic inches would be around 23.1 feet tall.

Recreational maths with 21380814

• 21380814 backwards is 41808312
• 21380814 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21380814's digits is 27
• More coming soon!