21015311680

Names of 21015311680

• Cardinal: 21015311680 can be written as Twenty-one billion, fifteen million, three hundred eleven thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.101531168 × 10¹⁰

Factors of 21015311680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 307

Divisors of 21015311680

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 29 31 32 40 44 55 58 62 64 80 88 110 116 124 145 155 160 176 220 229 232 248 290 310 319 320 341 352 440 458 464 496 580 620 638 682 704 841 880 899 916 928 992 1145 1160 1240 1276 1364 1595 1682 1705 1760 1798 1832 1856 1984 2290 2320 2480 2519 2552 2728 3190 3364 3410 3520 3596 3664 4205 4495 4580 4640 4960 5038 5104 5456 6380 6641 6728 6820 7099 7192 7328 8410 8990 9160 9251 9280 9889 9920 10076 10208 10912 12595 12760 13282 13456 13640 14198 14384 14656 16820 17980 18320 18502 19778 20152 20416 21824 25190 25520 26071 26564 26912 27280 28396 28768 33205 33640 35495 35960 36640 37004 39556 40304 46255 49445 50380 51040 52142 53128 53824 54560 56792 57536 66410 67280 70990 71920 73051 73280 74008 78089 79112 80608 92510 98890 100760 102080 104284 106256 109120 113584 130355 132820 134560 141980 143840 146102 148016 156178 158224 161216 185020 192589 197780 201520 205871 208568 212512 227168 260710 265640 269120 283960 286781 287680 292204 296032 312356 316448 365255 370040 385178 390445 395560 403040 411742 417136 425024 454336 521420 531280 567920 573562 584408 592064 624712 632896 730510 740080 770356 780890 791120 806080 823484 834272 962945 1029355 1042840 1062560 1135840 1147124 1168816 1249424 1433905 1461020 1480160 1540712 1561780 1582240 1646968 1668544 1925890 2058710 2085680 2118479 2125120 2264581 2271680 2294248 2337632 2498848 2867810 2922040 2960320 3081424 3123560 3164480 3293936 3851780 4117420 4171360 4236958 4529162 4588496 4675264 4997696 5735620 5844080 5970259 6162848 6247120 6587872 7703560 8234840 8342720 8473916 9058324 9176992 10592395 11322905 11471240 11688160 11940518 12325696 12494240 13175744 15407120 16469680 16947832 18116648 18353984 21184790 22645810 22942480 23376320 23881036 24988480 29851295 30814240 32939360 33895664 36233296 42369580 45291620 45884960 47762072 59702590 61628480 65672849 65878720 67791328 72466592 84739160 90583240 91769920 95524144 119405180 131345698 135582656 144933184 169478320 181166480 191048288 238810360 262691396 328364245 338956640 362332960 382096576 477620720 525382792 656728490 677913280 724665920 955241440 1050765584 1313456980 1910482880 2101531168 2626913960 4203062336 5253827920 10507655840 21015311680
• Sum of all divisors σ(n): 58618160640
• Sum of proper divisors (its aliquot sum) s(n): 37602848960
• 21015311680 is an abundant number, because the sum of its proper divisors (37602848960) is greater than itself. Its abundance is 16587537280

Bases of 21015311680

• Binary: 10011100100100111000011010101000000₂
• Hexadecimal: 0x4E49C3540
• Base-36: 9NJZ29S

Squares and roots of 21015311680

• 21015311680 squared (21015311680²) is 441643325007544422400
• 21015311680 cubed (21015311680³) is 9281272126425084388181573632000
• The square root of 21015311680 is 144966.5881505115
• The cube root of 21015311680 is 2759.5945494169

Scales and comparisons

• 21,015,311,680 seconds is equal to 668 years, 11 weeks, 3 days, 18 hours, 34 minutes, 40 seconds.
• To count from 1 to 21,015,311,680 would take you about one thousand, three hundred thirty-six 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 21015311680 cubic inches would be around 230 feet tall.

Recreational maths with 21015311680

• 21015311680 backwards is 08611351012
• The number of decimal digits it has is: 11
• The sum of 21015311680's digits is 28
• More coming soon!