21479689728

Names of 21479689728

• Cardinal: 21479689728 can be written as Twenty-one billion, four hundred seventy-nine million, six hundred eighty-nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1479689728 × 10¹⁰

Factors of 21479689728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 3392

Divisors of 21479689728

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 54 56 63 64 67 72 84 96 108 112 126 128 134 144 168 189 192 201 216 224 252 256 268 288 336 378 384 402 432 448 469 504 512 536 576 603 672 756 768 804 864 896 938 1008 1072 1152 1206 1344 1407 1512 1536 1608 1728 1792 1809 1876 2016 2144 2304 2412 2688 2814 3024 3216 3313 3456 3584 3618 3752 4032 4221 4288 4608 4824 5376 5628 6048 6432 6626 6912 7236 7504 8064 8442 8576 9648 9939 10752 11256 12096 12663 12864 13252 13824 14472 15008 16128 16884 17152 19296 19878 22512 23191 24192 25326 25728 26504 28944 29817 30016 32256 33768 34304 38592 39756 45024 46382 48384 50652 51456 53008 57888 59634 60032 67536 69573 77184 79512 89451 90048 92764 96768 101304 102912 106016 115776 119268 120064 135072 139146 154368 159024 178902 180096 185528 202608 208719 212032 221971 231552 238536 240128 270144 278292 308736 318048 357804 360192 371056 405216 417438 424064 443942 463104 477072 540288 556584 626157 636096 665913 715608 720384 742112 810432 834876 848128 887884 926208 954144 1080576 1113168 1252314 1272192 1331826 1431216 1484224 1553797 1620864 1669752 1696256 1775768 1908288 1997739 2161152 2226336 2504628 2544384 2663652 2862432 2968448 3107594 3241728 3339504 3551536 3816576 3995478 4452672 4661391 5009256 5088768 5327304 5724864 5936896 5993217 6215188 6483456 6679008 7103072 7633152 7990956 8905344 9322782 10018512 10654608 11449728 11873792 11986434 12430376 13358016 13984173 14206144 15266304 15981912 17810688 18645564 20037024 21309216 22899456 23972868 24860752 26716032 27968346 28412288 31963824 35621376 37291128 40074048 41952519 42618432 45798912 47945736 49721504 53432064 55936692 56824576 63927648 74582256 80148096 83905038 85236864 95891472 99443008 106864128 111873384 113649152 127855296 149164512 160296192 167810076 170473728 191782944 198886016 223746768 255710592 298329024 320592384 335620152 340947456 383565888 397772032 447493536 511421184 596658048 671240304 767131776 795544064 894987072 1022842368 1193316096 1342480608 1534263552 1789974144 2386632192 2684961216 3068527104 3579948288 5369922432 7159896576 10739844864 21479689728
• Sum of all divisors σ(n): 73771230720
• Sum of proper divisors (its aliquot sum) s(n): 52291540992
• 21479689728 is an abundant number, because the sum of its proper divisors (52291540992) is greater than itself. Its abundance is 30811851264

Bases of 21479689728

• Binary: 10100000000010010100000111000000000₂
• Hexadecimal: 0x5004A0E00
• Base-36: 9V8GAO0

Squares and roots of 21479689728

• 21479689728 squared (21479689728²) is 461377070811148713984
• 21479689728 cubed (21479689728³) is 9910236328636959659642534756352
• The square root of 21479689728 is 146559.5091694837
• The cube root of 21479689728 is 2779.7730146093

Scales and comparisons

• 21,479,689,728 seconds is equal to 682 years, 51 weeks, 2 days, 12 hours, 28 minutes, 48 seconds.
• To count from 1 to 21,479,689,728 would take you about one thousand, three hundred sixty-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 21479689728 cubic inches would be around 231.6 feet tall.

Recreational maths with 21479689728

• 21479689728 backwards is 82798697412
• 21479689728 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21479689728's digits is 63
• More coming soon!