21209490144

Names of 21209490144

• Cardinal: 21209490144 can be written as Twenty-one billion, two hundred nine million, four hundred ninety thousand, one hundred forty-four.

Scientific notation

• Scientific notation: 2.1209490144 × 10¹⁰

Factors of 21209490144

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 24548026

Divisors of 21209490144

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 72 96 108 144 216 288 432 864 24548021 49096042 73644063 98192084 147288126 196384168 220932189 294576252 392768336 441864378 589152504 662796567 785536672 883728756 1178305008 1325593134 1767457512 2356610016 2651186268 3534915024 5302372536 7069830048 10604745072 21209490144
• Sum of all divisors σ(n): 61861015440
• Sum of proper divisors (its aliquot sum) s(n): 40651525296
• 21209490144 is an abundant number, because the sum of its proper divisors (40651525296) is greater than itself. Its abundance is 19442035152

Bases of 21209490144

• Binary: 10011110000001011110010001011100000₂
• Hexadecimal: 0x4F02F22E0
• Base-36: 9QRKZC0

Squares and roots of 21209490144

• 21209490144 squared (21209490144²) is 449842472168433140736
• 21209490144 cubed (21209490144³) is 9540929479808977006363156905984
• The square root of 21209490144 is 145634.7834275863
• The cube root of 21209490144 is 2768.0679243693

Scales and comparisons

• 21,209,490,144 seconds is equal to 674 years, 20 weeks, 4 days, 5 hours, 2 minutes, 24 seconds.
• To count from 1 to 21,209,490,144 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 21209490144 cubic inches would be around 230.7 feet tall.

Recreational maths with 21209490144

• 21209490144 backwards is 44109490212
• 21209490144 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21209490144's digits is 36
• More coming soon!