21009487450

Names of 21009487450

• Cardinal: 21009487450 can be written as Twenty-one billion, nine million, four hundred eighty-seven thousand, four hundred fifty.

Scientific notation

• Scientific notation: 2.100948745 × 10¹⁰

Factors of 21009487450

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 121

Divisors of 21009487450

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 5 7 10 14 25 35 49 50 70 98 107 175 214 245 343 350 490 535 686 749 1070 1225 1498 1715 2450 2675 3430 3745 5243 5350 7490 8575 10486 11449 17150 18725 22898 26215 36701 37450 52430 57245 73402 80143 114490 131075 160286 183505 262150 286225 367010 400715 561001 572450 801430 917525 1122002 1225043 1835050 2003575 2450086 2805005 3927007 4007150 5610010 6125215 7854014 8575301 12250430 14025025 17150602 19635035 28050050 30626075 39270070 42876505 60027107 61252150 85753010 98175175 120054214 196350350 214382525 300135535 420189749 428765050 600271070 840379498 1500677675 2100948745 3001355350 4201897490 10504743725 21009487450
• Sum of all divisors σ(n): 46001520000
• Sum of proper divisors (its aliquot sum) s(n): 24992032550
• 21009487450 is an abundant number, because the sum of its proper divisors (24992032550) is greater than itself. Its abundance is 3982545100

Bases of 21009487450

• Binary: 10011100100010000110101011001011010₂
• Hexadecimal: 0x4E443565A
• Base-36: 9NGI89M

Squares and roots of 21009487450

• 21009487450 squared (21009487450²) is 441398562911707502500
• 21009487450 cubed (21009487450³) is 9273557567941554231844593625000
• The square root of 21009487450 is 144946.4985779235
• The cube root of 21009487450 is 2759.3395924817

Scales and comparisons

• 21,009,487,450 seconds is equal to 668 years, 1 week, 6 days, 8 hours, 44 minutes, 10 seconds.
• To count from 1 to 21,009,487,450 would take you about one thousand, three hundred thirty-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 21009487450 cubic inches would be around 229.9 feet tall.

Recreational maths with 21009487450

• 21009487450 backwards is 05478490012
• The number of decimal digits it has is: 11
• The sum of 21009487450's digits is 40
• More coming soon!