21808780720

Names of 21808780720

• Cardinal: 21808780720 can be written as Twenty-one billion, eight hundred eight million, seven hundred eighty thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.180878072 × 10¹⁰

Factors of 21808780720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3976

Divisors of 21808780720

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 16 20 40 80 89 178 356 445 712 890 1103 1424 1780 2206 2777 3560 4412 5515 5554 7120 8824 11030 11108 13885 17648 22060 22216 27770 44120 44432 55540 88240 98167 111080 196334 222160 247153 392668 490835 494306 785336 981670 988612 1235765 1570672 1963340 1977224 2471530 3063031 3926680 3954448 4943060 6126062 7853360 9886120 12252124 15315155 19772240 24504248 30630310 49008496 61260620 122521240 245042480 272609759 545219518 1090439036 1363048795 2180878072 2726097590 4361756144 5452195180 10904390360 21808780720
• Sum of all divisors σ(n): 51340106880
• Sum of proper divisors (its aliquot sum) s(n): 29531326160
• 21808780720 is an abundant number, because the sum of its proper divisors (29531326160) is greater than itself. Its abundance is 7722545440

Bases of 21808780720

• Binary: 10100010011111001111001010110110000₂
• Hexadecimal: 0x513E795B0
• Base-36: A0ODUWG

Squares and roots of 21808780720

• 21808780720 squared (21808780720²) is 475622916493043718400
• 21808780720 cubed (21808780720³) is 10372755891203661859959029248000
• The square root of 21808780720 is 147677.9628786909
• The cube root of 21808780720 is 2793.8974541801

Scales and comparisons

• 21,808,780,720 seconds is equal to 693 years, 23 weeks, 3 days, 10 hours, 38 minutes, 40 seconds.
• To count from 1 to 21,808,780,720 would take you about one thousand, three hundred eighty-six 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 21808780720 cubic inches would be around 232.8 feet tall.

Recreational maths with 21808780720

• 21808780720 backwards is 02708780812
• The number of decimal digits it has is: 11
• The sum of 21808780720's digits is 43
• More coming soon!