21198398720

Names of 21198398720

• Cardinal: 21198398720 can be written as Twenty-one billion, one hundred ninety-eight million, three hundred ninety-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.119839872 × 10¹⁰

Factors of 21198398720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 352421

Divisors of 21198398720

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 47 64 80 94 128 160 188 235 256 320 376 470 640 752 940 1280 1504 1880 3008 3760 6016 7520 12032 15040 30080 60160 352367 704734 1409468 1761835 2818936 3523670 5637872 7047340 11275744 14094680 16561249 22551488 28189360 33122498 45102976 56378720 66244996 82806245 90205952 112757440 132489992 165612490 225514880 264979984 331224980 451029760 529959968 662449960 1059919936 1324899920 2119839872 2649799840 4239679744 5299599680 10599199360 21198398720
• Sum of all divisors σ(n): 51857293824
• Sum of proper divisors (its aliquot sum) s(n): 30658895104
• 21198398720 is an abundant number, because the sum of its proper divisors (30658895104) is greater than itself. Its abundance is 9460496384

Bases of 21198398720

• Binary: 10011101111100001011110010100000000₂
• Hexadecimal: 0x4EF85E500
• Base-36: 9QKZ94W

Squares and roots of 21198398720

• 21198398720 squared (21198398720²) is 449372108292097638400
• 21198398720 cubed (21198398720³) is 9525969125222903963973582848000
• The square root of 21198398720 is 145596.6988636761
• The cube root of 21198398720 is 2767.5853232921

Scales and comparisons

• 21,198,398,720 seconds is equal to 674 years, 2 weeks, 1 day, 20 hours, 5 minutes, 20 seconds.
• To count from 1 to 21,198,398,720 would take you about one thousand, three hundred forty-eight years!

  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 21198398720 cubic inches would be around 230.6 feet tall.

Recreational maths with 21198398720

• 21198398720 backwards is 02789389112
• The number of decimal digits it has is: 11
• The sum of 21198398720's digits is 50
• More coming soon!