21159709788

Names of 21159709788

• Cardinal: 21159709788 can be written as Twenty-one billion, one hundred fifty-nine million, seven hundred nine thousand, seven hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1159709788 × 10¹⁰

Factors of 21159709788

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 356

Divisors of 21159709788

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 12 14 21 28 42 49 67 84 98 134 147 196 201 268 277 294 343 402 469 554 588 686 804 831 938 1029 1108 1372 1407 1662 1876 1939 2058 2814 3283 3324 3878 4116 5628 5817 6566 7756 9849 11634 13132 13573 18559 19698 22981 23268 27146 37118 39396 40719 45962 54292 55677 68943 74236 76729 81438 91924 95011 111354 129913 137886 153458 162876 190022 222708 230187 259826 275772 285033 306916 380044 389739 460374 519652 537103 570066 779478 909391 920748 1074206 1140132 1558956 1611309 1818782 2148412 2728173 3222618 3637564 3759721 5140843 5456346 6365737 6445236 7519442 10281686 10912692 11279163 12731474 15038884 15422529 19097211 20563372 22558326 25462948 26318047 30845058 35985901 38194422 45116652 52636094 61690116 71971802 76388844 78954141 105272188 107957703 143943604 157908282 215915406 251901307 315816564 431830812 503802614 755703921 1007605228 1511407842 1763309149 3022815684 3526618298 5289927447 7053236596 10579854894 21159709788
• Sum of all divisors σ(n): 58648531200
• Sum of proper divisors (its aliquot sum) s(n): 37488821412
• 21159709788 is an abundant number, because the sum of its proper divisors (37488821412) is greater than itself. Its abundance is 16329111624

Bases of 21159709788

• Binary: 10011101101001101111000110001011100₂
• Hexadecimal: 0x4ED378C5C
• Base-36: 9PXY0KC

Squares and roots of 21159709788

• 21159709788 squared (21159709788²) is 447733318312383004944
• 21159709788 cubed (21159709788³) is 9473907077908250311318409191872
• The square root of 21159709788 is 145463.7748307117
• The cube root of 21159709788 is 2765.9006028519

Scales and comparisons

• 21,159,709,788 seconds is equal to 672 years, 42 weeks, 2 days, 1 hour, 9 minutes, 48 seconds.
• To count from 1 to 21,159,709,788 would take you about one thousand, three hundred forty-five 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 21159709788 cubic inches would be around 230.5 feet tall.

Recreational maths with 21159709788

• 21159709788 backwards is 88790795112
• The number of decimal digits it has is: 11
• The sum of 21159709788's digits is 57
• More coming soon!