21311581904

Names of 21311581904

• Cardinal: 21311581904 can be written as Twenty-one billion, three hundred eleven million, five hundred eighty-one thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1311581904 × 10¹⁰

Factors of 21311581904

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 388

Divisors of 21311581904

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 8 16 31 62 67 124 134 137 151 248 268 274 302 496 536 548 604 961 1072 1096 1208 1922 2077 2192 2416 3844 4154 4247 4681 7688 8308 8494 9179 9362 10117 15376 16616 16988 18358 18724 20234 20687 33232 33976 36716 37448 40468 41374 64387 67952 73432 74896 80936 82748 128774 131657 145111 146864 161872 165496 257548 263314 284549 290222 313627 330992 515096 526628 569098 580444 627254 641297 1030192 1053256 1138196 1160888 1254508 1282594 1386029 2106512 2276392 2321776 2509016 2565188 2772058 4552784 5018032 5130376 5544116 8821019 9722437 10260752 11088232 17642038 19444874 19880207 22176464 35284076 38889748 39760414 42966899 70568152 77779496 79520828 85933798 141136304 155558992 159041656 171867596 318083312 343735192 687470384 1331973869 2663947738 5327895476 10655790952 21311581904
• Sum of all divisors σ(n): 43907886144
• Sum of proper divisors (its aliquot sum) s(n): 22596304240
• 21311581904 is an abundant number, because the sum of its proper divisors (22596304240) is greater than itself. Its abundance is 1284722336

Bases of 21311581904

• Binary: 10011110110010001001110111011010000₂
• Hexadecimal: 0x4F644EED0
• Base-36: 9SGD5U8

Squares and roots of 21311581904

• 21311581904 squared (21311581904²) is 454183523250900265216
• 21311581904 cubed (21311581904³) is 9679369355208849343886106251264
• The square root of 21311581904 is 145984.8687501553
• The cube root of 21311581904 is 2772.5021769407

Scales and comparisons

• 21,311,581,904 seconds is equal to 677 years, 33 weeks, 2 days, 19 hours, 51 minutes, 44 seconds.
• To count from 1 to 21,311,581,904 would take you about one thousand, three hundred fifty-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 21311581904 cubic inches would be around 231 feet tall.

Recreational maths with 21311581904

• 21311581904 backwards is 40918511312
• The number of decimal digits it has is: 11
• The sum of 21311581904's digits is 35
• More coming soon!