21329970

Names of 21329970

• Cardinal: 21329970 can be written as Twenty-one million, three hundred twenty-nine thousand, nine hundred seventy.

Scientific notation

• Scientific notation: 2.132997 × 10⁷

Factors of 21329970

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1679

Divisors of 21329970

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 15 19 23 30 38 46 57 69 95 114 115 138 190 230 285 345 437 570 690 874 1311 1627 2185 2622 3254 4370 4881 6555 8135 9762 13110 16270 24405 30913 37421 48810 61826 74842 92739 112263 154565 185478 187105 224526 309130 374210 463695 561315 710999 927390 1122630 1421998 2132997 3554995 4265994 7109990 10664985 21329970
• Sum of all divisors σ(n): 56263680
• Sum of proper divisors (its aliquot sum) s(n): 34933710
• 21329970 is an abundant number, because the sum of its proper divisors (34933710) is greater than itself. Its abundance is 13603740

Bases of 21329970

• Binary: 1010001010111100000110010₂
• Hexadecimal: 0x1457832
• Base-36: CP6B6

Squares and roots of 21329970

• 21329970 squared (21329970²) is 454967620200900
• 21329970 cubed (21329970³) is 9704445689856590973000
• The square root of 21329970 is 4618.4380476521
• The cube root of 21329970 is 277.3299339425

Scales and comparisons

• 21,329,970 seconds is equal to 35 weeks, 1 day, 20 hours, 59 minutes, 30 seconds.
• To count from 1 to 21,329,970 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 21329970 cubic inches would be around 23.1 feet tall.

Recreational maths with 21329970

• 21329970 backwards is 07992312
• The number of decimal digits it has is: 8
• The sum of 21329970's digits is 33
• More coming soon!