21284128089

Names of 21284128089

• Cardinal: 21284128089 can be written as Twenty-one billion, two hundred eighty-four million, one hundred twenty-eight thousand and eighty-nine.

Scientific notation

• Scientific notation: 2.1284128089 × 10¹⁰

Factors of 21284128089

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2497

Divisors of 21284128089

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 9 21 43 49 63 129 147 301 387 441 613 903 1831 1839 2107 2709 4291 5493 5517 6321 12817 12873 16479 18963 26359 30037 38451 38619 78733 79077 89719 90111 115353 184513 236199 237231 269157 270333 551131 553539 708597 807471 1122403 1291591 1653393 1660617 3367209 3857917 3874773 4960179 7856821 10101627 11573751 11624319 23570463 34721253 48263329 54997747 70711389 144789987 164993241 337843303 434369961 494979723 1013529909 2364903121 3040589727 7094709363 21284128089
• Sum of all divisors σ(n): 36674544192
• Sum of proper divisors (its aliquot sum) s(n): 15390416103
• 21284128089 is a deficient number, because the sum of its proper divisors (15390416103) is less than itself. Its deficiency is 5893711986

Bases of 21284128089

• Binary: 10011110100101000100000010101011001₂
• Hexadecimal: 0x4F4A20559
• Base-36: 9S00QC9

Squares and roots of 21284128089

• 21284128089 squared (21284128089²) is 453014108508958791921
• 21284128089 cubed (21284128089³) is 9642010311628823731269262368969
• The square root of 21284128089 is 145890.8087886279
• The cube root of 21284128089 is 2771.3111427257

Scales and comparisons

• 21,284,128,089 seconds is equal to 676 years, 40 weeks, 1 hour, 48 minutes, 9 seconds.
• To count from 1 to 21,284,128,089 would take you about one thousand, three hundred fifty-three 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 21284128089 cubic inches would be around 230.9 feet tall.

Recreational maths with 21284128089

• 21284128089 backwards is 98082148212
• The number of decimal digits it has is: 11
• The sum of 21284128089's digits is 45
• More coming soon!