21297645472

Names of 21297645472

• Cardinal: 21297645472 can be written as Twenty-one billion, two hundred ninety-seven million, six hundred forty-five thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 2.1297645472 × 10¹⁰

Factors of 21297645472

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 972

Divisors of 21297645472

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 4 8 16 29 32 58 116 232 464 841 928 941 1682 1882 3364 3764 6728 7528 13456 15056 24389 26912 27289 30112 48778 54578 97556 109156 195112 218312 390224 436624 707281 780448 791381 873248 1414562 1582762 2829124 3165524 5658248 6331048 11316496 12662096 22632992 22950049 25324192 45900098 91800196 183600392 367200784 665551421 734401568 1331102842 2662205684 5324411368 10648822736 21297645472
• Sum of all divisors σ(n): 43473378186
• Sum of proper divisors (its aliquot sum) s(n): 22175732714
• 21297645472 is an abundant number, because the sum of its proper divisors (22175732714) is greater than itself. Its abundance is 878087242

Bases of 21297645472

• Binary: 10011110101011100000100011110100000₂
• Hexadecimal: 0x4F57047A0
• Base-36: 9S82GF4

Squares and roots of 21297645472

• 21297645472 squared (21297645472²) is 453589702651002102784
• 21297645472 cubed (21297645472³) is 9660392676810941330620136194048
• The square root of 21297645472 is 145937.1284903195
• The cube root of 21297645472 is 2771.8976979027

Scales and comparisons

• 21,297,645,472 seconds is equal to 677 years, 10 weeks, 2 days, 12 hours, 37 minutes, 52 seconds.
• To count from 1 to 21,297,645,472 would take you about one thousand, three hundred fifty-four 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 21297645472 cubic inches would be around 231 feet tall.

Recreational maths with 21297645472

• 21297645472 backwards is 27454679212
• The number of decimal digits it has is: 11
• The sum of 21297645472's digits is 49
• More coming soon!