21428943471

Names of 21428943471

• Cardinal: 21428943471 can be written as Twenty-one billion, four hundred twenty-eight million, nine hundred forty-three thousand, four hundred seventy-one.

Scientific notation

• Scientific notation: 2.1428943471 × 10¹⁰

Factors of 21428943471

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 480

Divisors of 21428943471

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 9 13 27 31 39 79 93 97 117 237 257 279 291 351 403 711 771 837 873 1027 1209 1261 2133 2313 2449 2619 3007 3081 3341 3627 3783 6939 7347 7663 7967 9021 9243 10023 10881 11349 20303 22041 22989 23901 24929 27063 27729 30069 31837 34047 39091 60909 66123 68967 71703 74787 81189 90207 95511 99619 103571 117273 182727 206901 215109 224361 237553 263939 286533 298857 310713 324077 351819 548181 629393 673083 712659 772799 791817 859599 896571 932139 972231 1055457 1888179 1969391 2137977 2318397 2375451 2689713 2796417 2916693 3088189 5664537 5908173 6413931 6955191 7126353 8182109 8750079 9264567 10046387 16993611 17724519 20865573 24546327 25602083 27793701 30139161 53173557 61051121 73638981 76806249 83381103 90417483 183153363 220916943 230418747 271252449 549460089 691256241 793664573 1648380267 2380993719 7142981157 21428943471
• Sum of all divisors σ(n): 36247142400
• Sum of proper divisors (its aliquot sum) s(n): 14818198929
• 21428943471 is a deficient number, because the sum of its proper divisors (14818198929) is less than itself. Its deficiency is 6610744542

Bases of 21428943471

• Binary: 10011111101010000111011101001101111₂
• Hexadecimal: 0x4FD43BA6F
• Base-36: 9UE8MLR

Squares and roots of 21428943471

• 21428943471 squared (21428943471²) is 459199618283313527841
• 21428943471 cubed (21428943471³) is 9840162662097903650674373676111
• The square root of 21428943471 is 146386.2817035805
• The cube root of 21428943471 is 2777.5821960285

Scales and comparisons

• 21,428,943,471 seconds is equal to 681 years, 19 weeks, 3 days, 4 hours, 17 minutes, 51 seconds.
• To count from 1 to 21,428,943,471 would take you about one thousand, three hundred sixty-two 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 21428943471 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428943471

• 21428943471 backwards is 17434982412
• The number of decimal digits it has is: 11
• The sum of 21428943471's digits is 45
• More coming soon!