21069972

Names of 21069972

• Cardinal: 21069972 can be written as Twenty-one million, sixty-nine thousand, nine hundred seventy-two.

Scientific notation

• Scientific notation: 2.1069972 × 10⁷

Factors of 21069972

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 714

Divisors of 21069972

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 3 4 6 7 9 11 12 14 18 21 22 28 33 36 42 44 63 66 77 84 99 121 126 132 154 198 231 242 252 308 363 396 462 484 691 693 726 847 924 1089 1382 1386 1452 1694 2073 2178 2541 2764 2772 3388 4146 4356 4837 5082 6219 7601 7623 8292 9674 10164 12438 14511 15202 15246 19348 22803 24876 29022 30404 30492 43533 45606 53207 58044 68409 83611 87066 91212 106414 136818 159621 167222 174132 212828 250833 273636 319242 334444 478863 501666 585277 638484 752499 957726 1003332 1170554 1504998 1755831 1915452 2341108 3009996 3511662 5267493 7023324 10534986 21069972
• Sum of all divisors σ(n): 67002208
• Sum of proper divisors (its aliquot sum) s(n): 45932236
• 21069972 is an abundant number, because the sum of its proper divisors (45932236) is greater than itself. Its abundance is 24862264

Bases of 21069972

• Binary: 1010000011000000010010100₂
• Hexadecimal: 0x1418094
• Base-36: CJLP0

Squares and roots of 21069972

• 21069972 squared (21069972²) is 443943720080784
• 21069972 cubed (21069972³) is 9353881751677956618048
• The square root of 21069972 is 4590.2039170389
• The cube root of 21069972 is 276.1985024431

Scales and comparisons

• 21,069,972 seconds is equal to 34 weeks, 5 days, 20 hours, 46 minutes, 12 seconds.
• To count from 1 to 21,069,972 would take you about nineteen 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 21069972 cubic inches would be around 23 feet tall.

Recreational maths with 21069972

• 21069972 backwards is 27996012
• 21069972 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21069972's digits is 36
• More coming soon!