20681388

Names of 20681388

• Cardinal: 20681388 can be written as Twenty million, six hundred eighty-one thousand, three hundred eighty-eight.

Scientific notation

• Scientific notation: 2.0681388 × 10⁷

Factors of 20681388

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 191

Divisors of 20681388

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 9 12 13 14 18 21 26 28 36 39 42 52 59 63 78 84 91 107 117 118 126 156 177 182 214 234 236 252 273 321 354 364 413 428 468 531 546 642 708 749 767 819 826 963 1062 1092 1239 1284 1391 1498 1534 1638 1652 1926 2124 2247 2301 2478 2782 2996 3068 3276 3717 3852 4173 4494 4602 4956 5369 5564 6313 6741 6903 7434 8346 8988 9204 9737 10738 12519 12626 13482 13806 14868 16107 16692 18939 19474 21476 25038 25252 26964 27612 29211 32214 37878 38948 44191 48321 50076 56817 58422 64428 75756 82069 87633 88382 96642 113634 116844 132573 164138 175266 176764 193284 227268 246207 265146 328276 350532 397719 492414 530292 574483 738621 795438 984828 1148966 1477242 1590876 1723449 2297932 2954484 3446898 5170347 6893796 10340694 20681388
• Sum of all divisors σ(n): 66044160
• Sum of proper divisors (its aliquot sum) s(n): 45362772
• 20681388 is an abundant number, because the sum of its proper divisors (45362772) is greater than itself. Its abundance is 24681384

Bases of 20681388

• Binary: 1001110111001001010101100₂
• Hexadecimal: 0x13B92AC
• Base-36: CB9V0

Squares and roots of 20681388

• 20681388 squared (20681388²) is 427719809606544
• 20681388 cubed (20681388³) is 8845839337759063803072
• The square root of 20681388 is 4547.6794082257
• The cube root of 20681388 is 274.4900212363

Scales and comparisons

• 20,681,388 seconds is equal to 34 weeks, 1 day, 8 hours, 49 minutes, 48 seconds.
• To count from 1 to 20,681,388 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 20681388 cubic inches would be around 22.9 feet tall.

Recreational maths with 20681388

• 20681388 backwards is 88318602
• 20681388 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20681388's digits is 36
• More coming soon!