21078806040

Names of 21078806040

• Cardinal: 21078806040 can be written as Twenty-one billion, seventy-eight million, eight hundred six thousand and forty.

Scientific notation

• Scientific notation: 2.107880604 × 10¹⁰

Factors of 21078806040

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 19517423

Divisors of 21078806040

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 90 108 120 135 180 216 270 360 540 1080 19517413 39034826 58552239 78069652 97587065 117104478 156139304 175656717 195174130 234208956 292761195 351313434 390348260 468417912 526970151 585522390 702626868 780696520 878283585 1053940302 1171044780 1405253736 1756567170 2107880604 2342089560 2634850755 3513134340 4215761208 5269701510 7026268680 10539403020 21078806040
• Sum of all divisors σ(n): 70262690400
• Sum of proper divisors (its aliquot sum) s(n): 49183884360
• 21078806040 is an abundant number, because the sum of its proper divisors (49183884360) is greater than itself. Its abundance is 28105078320

Bases of 21078806040

• Binary: 10011101000011001010000111000011000₂
• Hexadecimal: 0x4E8650E18
• Base-36: 9OLRYU0

Squares and roots of 21078806040

• 21078806040 squared (21078806040²) is 444316064071940481600
• 21078806040 cubed (21078806040³) is 9365652135028646018070588864000
• The square root of 21078806040 is 145185.4195158729
• The cube root of 21078806040 is 2762.3709777515

Scales and comparisons

• 21,078,806,040 seconds is equal to 670 years, 12 weeks, 3 days, 15 hours, 54 minutes.
• To count from 1 to 21,078,806,040 would take you about one thousand, three hundred forty 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 21078806040 cubic inches would be around 230.2 feet tall.

Recreational maths with 21078806040

• 21078806040 backwards is 04060887012
• 21078806040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21078806040's digits is 36
• More coming soon!