21395356920

Names of 21395356920

• Cardinal: 21395356920 can be written as Twenty-one billion, three hundred ninety-five million, three hundred fifty-six thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.139535692 × 10¹⁰

Factors of 21395356920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4308

Divisors of 21395356920

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 43 45 47 56 60 63 70 72 84 86 90 94 105 120 126 129 140 141 168 172 180 188 210 215 235 252 258 280 282 301 315 329 344 360 376 387 420 423 430 470 504 516 564 602 630 645 658 705 774 840 846 860 903 940 987 1032 1128 1204 1260 1290 1316 1410 1505 1548 1645 1692 1720 1806 1880 1935 1974 2021 2115 2408 2520 2580 2632 2709 2820 2961 3010 3096 3290 3384 3612 3870 3948 4042 4201 4230 4515 4935 5160 5418 5640 5922 6020 6063 6580 7224 7740 7896 8084 8402 8460 9030 9870 10105 10836 11844 12040 12126 12603 13160 13545 14147 14805 15480 16168 16804 16920 18060 18189 19740 20210 21005 21672 23688 24252 25206 27090 28294 29407 29610 30315 33608 36120 36378 37809 39480 40420 42010 42441 48504 50412 54180 56588 58814 59220 60630 63015 70735 72756 75618 80840 84020 84882 88221 90945 100824 108360 113176 117628 118440 121260 126030 127323 141470 145512 147035 151236 168040 169764 176442 180643 181890 189045 197447 212205 235256 242520 252060 254646 264663 282940 294070 302472 339528 352884 361286 363780 378090 394894 424410 441105 504120 509292 529326 541929 565880 588140 592341 636615 705768 722572 727560 756180 789788 848820 882210 903215 987235 1018584 1058652 1083858 1176280 1184682 1264501 1273230 1323315 1382129 1445144 1512360 1579576 1625787 1697640 1764420 1777023 1806430 1974470 2117304 2167716 2369364 2529002 2546460 2646630 2709645 2764258 2961705 3251574 3528840 3554046 3612860 3793503 3948940 4146387 4335432 4738728 5058004 5092920 5293260 5419290 5528516 5923410 6322505 6503148 6910645 7108092 7225720 7587006 7897880 8128935 8292774 8490221 8885115 10116008 10586520 10838580 11057032 11380509 11846820 12439161 12645010 13006296 13821290 14216184 15174012 16257870 16585548 16980442 17770230 18967515 20731935 21677160 22761018 23693640 24878322 25290020 25470663 27642580 30348024 32515740 33171096 33960884 35540460 37935030 41463870 42451105 45522036 49756644 50580040 50941326 55285160 56902545 59431547 62195805 65031480 67921768 71080920 75870060 76411989 82927740 84902210 91044072 99513288 101882652 113805090 118863094 124391610 127353315 151740120 152823978 165855480 169804420 178294641 203765304 227610180 237726188 248783220 254706630 297157735 305647956 339608840 356589282 382059945 455220360 475452376 497566440 509413260 534883923 594315470 611295912 713178564 764119890 891473205 1018826520 1069767846 1188630940 1426357128 1528239780 1782946410 2139535692 2377261880 2674419615 3056479560 3565892820 4279071384 5348839230 7131785640 10697678460 21395356920
• Sum of all divisors σ(n): 83066480640
• Sum of proper divisors (its aliquot sum) s(n): 61671123720
• 21395356920 is an abundant number, because the sum of its proper divisors (61671123720) is greater than itself. Its abundance is 40275766800

Bases of 21395356920

• Binary: 10011111011010000110011110011111000₂
• Hexadecimal: 0x4FB433CF8
• Base-36: 9TU8R20

Squares and roots of 21395356920

• 21395356920 squared (21395356920²) is 457761297734191886400
• 21395356920 cubed (21395356920³) is 9793966349185422697296093888000
• The square root of 21395356920 is 146271.5178016555
• The cube root of 21395356920 is 2776.1302938761

Scales and comparisons

• 21,395,356,920 seconds is equal to 680 years, 15 weeks, 6 days, 10 hours, 42 minutes.
• To count from 1 to 21,395,356,920 would take you about one thousand, three hundred sixty 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 21395356920 cubic inches would be around 231.3 feet tall.

Recreational maths with 21395356920

• 21395356920 backwards is 02965359312
• 21395356920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21395356920's digits is 45
• More coming soon!