21428254992

Names of 21428254992

• Cardinal: 21428254992 can be written as Twenty-one billion, four hundred twenty-eight million, two hundred fifty-four thousand, nine hundred ninety-two.

Scientific notation

• Scientific notation: 2.1428254992 × 10¹⁰

Factors of 21428254992

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 464575

Divisors of 21428254992

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 31 48 62 93 124 186 248 372 496 744 961 1488 1922 2883 3844 5766 7688 11532 15376 23064 46128 464539 929078 1393617 1858156 2787234 3716312 5574468 7432624 11148936 14400709 22297872 28801418 43202127 57602836 86404254 115205672 172808508 230411344 345617016 446421979 691234032 892843958 1339265937 1785687916 2678531874 3571375832 5357063748 7142751664 10714127496 21428254992
• Sum of all divisors σ(n): 57199739280
• Sum of proper divisors (its aliquot sum) s(n): 35771484288
• 21428254992 is an abundant number, because the sum of its proper divisors (35771484288) is greater than itself. Its abundance is 14343229296

Bases of 21428254992

• Binary: 10011111101001110010011100100010000₂
• Hexadecimal: 0x4FD393910
• Base-36: 9UDTVDC

Squares and roots of 21428254992

• 21428254992 squared (21428254992²) is 459170112002172920064
• 21428254992 cubed (21428254992³) is 9839214244687760989208624959488
• The square root of 21428254992 is 146383.9301016337
• The cube root of 21428254992 is 2777.5524492285

Scales and comparisons

• 21,428,254,992 seconds is equal to 681 years, 18 weeks, 2 days, 5 hours, 3 minutes, 12 seconds.
• To count from 1 to 21,428,254,992 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 21428254992 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428254992

• 21428254992 backwards is 29945282412
• 21428254992 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21428254992's digits is 48
• More coming soon!