20991180

Names of 20991180

• Cardinal: 20991180 can be written as Twenty million, nine hundred ninety-one thousand, one hundred eighty.

Scientific notation

• Scientific notation: 2.099118 × 10⁷

Factors of 20991180

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 134

Divisors of 20991180

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 23 28 30 35 41 42 46 53 60 69 70 82 84 92 105 106 115 123 138 140 159 161 164 205 210 212 230 246 265 276 287 318 322 345 371 410 420 460 483 492 530 574 615 636 644 690 742 795 805 820 861 943 966 1060 1113 1148 1219 1230 1380 1435 1484 1590 1610 1722 1855 1886 1932 2173 2226 2415 2438 2460 2829 2870 3180 3220 3444 3657 3710 3772 4305 4346 4452 4715 4830 4876 5565 5658 5740 6095 6519 6601 7314 7420 8533 8610 8692 9430 9660 10865 11130 11316 12190 13038 13202 14145 14628 15211 17066 17220 18285 18860 19803 21730 22260 24380 25599 26076 26404 28290 30422 32595 33005 34132 36570 39606 42665 43460 45633 49979 51198 56580 60844 65190 66010 73140 76055 79212 85330 91266 99015 99958 102396 127995 130380 132020 149937 152110 170660 182532 198030 199916 228165 249895 255990 299874 304220 349853 396060 456330 499790 511980 599748 699706 749685 912660 999580 1049559 1399412 1499370 1749265 2099118 2998740 3498530 4198236 5247795 6997060 10495590 20991180
• Sum of all divisors σ(n): 73156608
• Sum of proper divisors (its aliquot sum) s(n): 52165428
• 20991180 is an abundant number, because the sum of its proper divisors (52165428) is greater than itself. Its abundance is 31174248

Bases of 20991180

• Binary: 1010000000100110011001100₂
• Hexadecimal: 0x1404CCC
• Base-36: CHWWC

Squares and roots of 20991180

• 20991180 squared (20991180²) is 440629637792400
• 20991180 cubed (20991180³) is 9249336040235071032000
• The square root of 20991180 is 4581.6132529929
• The cube root of 20991180 is 275.8537872909

Scales and comparisons

• 20,991,180 seconds is equal to 34 weeks, 4 days, 22 hours, 53 minutes.
• To count from 1 to 20,991,180 would take you about ten 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 20991180 cubic inches would be around 23 feet tall.

Recreational maths with 20991180

• 20991180 backwards is 08119902
• 20991180 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20991180's digits is 30
• More coming soon!