21729555855

Names of 21729555855

• Cardinal: 21729555855 can be written as Twenty-one billion, seven hundred twenty-nine million, five hundred fifty-five thousand, eight hundred fifty-five.

Scientific notation

• Scientific notation: 2.1729555855 × 10¹⁰

Factors of 21729555855

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1020

Divisors of 21729555855

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 63 105 127 135 189 315 331 381 547 635 889 945 993 1143 1641 1655 1905 2317 2667 2735 2979 3429 3829 4445 4923 4965 5715 6951 8001 8205 8937 11487 11585 13335 14769 14895 17145 19145 20853 24003 24615 34461 34755 40005 42037 44685 57435 62559 69469 73845 103383 104265 120015 126111 172305 181057 208407 210185 294259 312795 347345 378333 486283 516915 543171 625221 630555 882777 905285 1042035 1134999 1267399 1458849 1471295 1629513 1875663 1891665 2431415 2648331 2715855 3126105 3802197 4376547 4413885 4888539 5674995 6336995 7294245 7944993 8147565 9378315 11406591 13129641 13241655 19010985 21882735 22994239 24442695 34219773 39724965 57032955 65648205 68982717 114971195 160959673 171098865 206948151 344913585 482879019 620844453 804798365 1034740755 1448637057 2414395095 3104222265 4345911171 7243185285 21729555855
• Sum of all divisors σ(n): 44712591360
• Sum of proper divisors (its aliquot sum) s(n): 22983035505
• 21729555855 is an abundant number, because the sum of its proper divisors (22983035505) is greater than itself. Its abundance is 1253479650

Bases of 21729555855

• Binary: 10100001111001011101011010110001111₂
• Hexadecimal: 0x50F2EB58F
• Base-36: 9ZD7SLR

Squares and roots of 21729555855

• 21729555855 squared (21729555855²) is 472173597655564781025
• 21729555855 cubed (21729555855³) is 10260122563512891960853581651375
• The square root of 21729555855 is 147409.4835992583
• The cube root of 21729555855 is 2790.5102142401

Scales and comparisons

• 21,729,555,855 seconds is equal to 690 years, 48 weeks, 3 days, 11 hours, 44 minutes, 15 seconds.
• To count from 1 to 21,729,555,855 would take you about one thousand, three hundred eighty-one 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 21729555855 cubic inches would be around 232.5 feet tall.

Recreational maths with 21729555855

• 21729555855 backwards is 55855592712
• The number of decimal digits it has is: 11
• The sum of 21729555855's digits is 54
• More coming soon!