21154894740

Names of 21154894740

• Cardinal: 21154894740 can be written as Twenty-one billion, one hundred fifty-four million, eight hundred ninety-four thousand, seven hundred forty.

Scientific notation

• Scientific notation: 2.115489474 × 10¹⁰

Factors of 21154894740

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 870

Divisors of 21154894740

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 54 60 63 70 81 84 90 105 108 126 135 140 162 180 189 210 243 252 270 315 324 378 405 420 486 540 567 630 729 756 810 853 945 972 1134 1215 1260 1458 1620 1701 1706 1890 2187 2268 2430 2559 2835 2916 3402 3412 3645 3780 4265 4374 4860 5103 5118 5670 5971 6561 6804 7290 7677 8505 8530 8748 10206 10236 10935 11340 11942 12795 13122 14580 15309 15354 17010 17060 17913 19683 20412 21870 23031 23884 25515 25590 26244 29855 30618 30708 32805 34020 35826 38385 39366 43740 45927 46062 51030 51180 53739 59049 59710 61236 65610 69093 71652 76545 76770 78732 89565 91854 92124 98415 102060 107478 115155 118098 119420 131220 137781 138186 153090 153540 161217 177147 179130 183708 196830 207279 214956 229635 230310 236196 268695 275562 276372 295245 306180 322434 345465 354294 358260 393660 413343 414558 459270 460620 483651 537390 551124 590490 621837 644868 688905 690930 708588 806085 826686 829116 885735 918540 967302 1036395 1074780 1180980 1240029 1243674 1377810 1381860 1450953 1612170 1653372 1771470 1865511 1934604 2066715 2072790 2418255 2480058 2487348 2755620 2901906 3109185 3224340 3542940 3731022 4133430 4145580 4352859 4836510 4960116 5596533 5803812 6200145 6218370 7254765 7462044 8266860 8705718 9327555 9673020 11193066 12400290 12436740 13058577 14509530 16789599 17411436 18655110 21764295 22386132 24800580 26117154 27982665 29019060 33579198 37310220 39175731 43528590 50368797 52234308 55965330 65292885 67158396 78351462 83947995 87057180 100737594 111930660 117527193 130585770 151106391 156702924 167895990 195878655 201475188 235054386 251843985 261171540 302212782 335791980 352581579 391757310 470108772 503687970 587635965 604425564 705163158 755531955 783514620 1007375940 1057744737 1175271930 1410326316 1511063910 1762907895 2115489474 2350543860 3022127820 3525815790 4230978948 5288723685 7051631580 10577447370 21154894740
• Sum of all divisors σ(n): 76246759680
• Sum of proper divisors (its aliquot sum) s(n): 55091864940
• 21154894740 is an abundant number, because the sum of its proper divisors (55091864940) is greater than itself. Its abundance is 33936970200

Bases of 21154894740

• Binary: 10011101100111011100001001110010100₂
• Hexadecimal: 0x4ECEE1394
• Base-36: 9PV2T90

Squares and roots of 21154894740

• 21154894740 squared (21154894740²) is 447529571460479667600
• 21154894740 cubed (21154894740³) is 9467440977283755437988188424000
• The square root of 21154894740 is 145447.2232117203
• The cube root of 21154894740 is 2765.6907865765

Scales and comparisons

• 21,154,894,740 seconds is equal to 672 years, 34 weeks, 2 days, 7 hours, 39 minutes.
• To count from 1 to 21,154,894,740 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 21154894740 cubic inches would be around 230.5 feet tall.

Recreational maths with 21154894740

• 21154894740 backwards is 04749845112
• 21154894740 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21154894740's digits is 45
• More coming soon!