21155401638405
21,155,401,638,405 is an odd composite number composed of five prime numbers multiplied together.
21155401638405 is an odd composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred seventy divisors.
Prime factorization of 21155401638405:
34 × 5 × 192 × 232 × 5232
(3 × 3 × 3 × 3 × 5 × 19 × 19 × 23 × 23 × 523 × 523)See below for interesting mathematical facts about the number 21155401638405 from the Numbermatics database.
Names of 21155401638405
- Cardinal: 21155401638405 can be written as Twenty-one trillion, one hundred fifty-five billion, four hundred one million, six hundred thirty-eight thousand, four hundred five.
Scientific notation
- Scientific notation: 2.1155401638405 × 1013
Factors of 21155401638405
Divisors of 21155401638405
- Number of divisors d(n): 270
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Complete list of divisors:
1 3 5 9 15 19 23 27 45 57 69 81 95 115 135 171 207 285 345 361 405 437 513 523 529 621 855 1035 1083 1311 1539 1569 1587 1805 1863 2185 2565 2615 2645 3105 3249 3933 4707 4761 5415 6555 7695 7845 7935 8303 9315 9747 9937 10051 11799 12029 14121 14283 16245 19665 23535 23805 24909 29241 29811 30153 35397 36087 41515 42363 42849 48735 49685 50255 58995 60145 70605 71415 74727 89433 90459 108261 124545 146205 149055 150765 176985 180435 188803 190969 211815 214245 224181 228551 268299 271377 273529 276667 324783 373635 447165 452295 541305 566409 572907 672543 685653 804897 814131 820587 830001 944015 954845 974349 1120905 1142755 1341495 1356885 1367645 1383335 1623915 1699227 1718721 2056959 2461761 2490003 2832045 2864535 3362715 3428265 4024485 4070655 4102935 4150005 4342469 4871745 5097681 5156163 5197051 5256673 6170877 6291167 7385283 7470009 8496135 8593605 10284795 12308805 12450015 13027407 15293043 15468489 15591153 15770019 18512631 18873501 21712345 22155849 22410027 25488405 25780815 25985255 26283365 30854385 31455835 36926415 37350045 39082221 46773459 47310057 56620503 65137035 76465215 77342445 77955765 78850095 92563155 94367505 98743969 99876787 110779245 112050135 117246663 119532173 140320377 141930171 144696841 169861509 195411105 233867295 236550285 283102515 296231907 299630361 351739989 358596519 420961131 425790513 434090523 493719845 499383935 509584527 586233315 597660865 701601885 709650855 723484205 849307545 888695721 898891083 1075789557 1302271569 1481159535 1498151805 1758699945 1792982595 2104805655 2128952565 2170452615 2271111287 2547922635 2666087163 2696673249 2749239979 3227368671 3906814707 4443478605 4494455415 5378947785 6511357845 6813333861 7998261489 8090019747 8247719937 9682106013 11355556435 11720444121 13330435815 13483366245 13746199895 16136843355 19534073535 20440001583 24743159811 34066669305 39991307445 40450098735 41238599685 48410530065 52235559601 58602220605 61320004749 74229479433 102200007915 123715799055 156706678803 183960014247 222688438299 261177798005 306600023745 371147397165 470120036409 783533394015 919800071235 1113442191495 1410360109227 2350600182045 4231080327681 7051800546135 21155401638405
- Sum of all divisors σ(n): 41920001377254
- Sum of proper divisors (its aliquot sum) s(n): 20764599738849
- 21155401638405 is a deficient number, because the sum of its proper divisors (20764599738849) is less than itself. Its deficiency is 390801899556
Bases of 21155401638405
- Binary: 1001100111101101000000011001100100010000001012
- Hexadecimal: 0x133DA0332205
- Base-36: 7HYNNX3B9
Squares and roots of 21155401638405
- 21155401638405 squared (211554016384052) is 447551018482228958370944025
- 21155401638405 cubed (211554016384053) is 9468121549668772942297005766231545280125
-
The
square root of 21155401638405 is 4599500.1509299899 -
The
cube root of 21155401638405 is 27657.1287623259
Scales and comparisons
How big is 21155401638405?- 21,155,401,638,405 seconds is equal to 672,676 years, 17 weeks, 2 days, 15 hours, 6 minutes, 45 seconds.
-
To count from 1 to 21,155,401,638,405 would take you about one million, six hundred eighty-one thousand, six hundred ninety 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 21155401638405 cubic inches would be around 2304.8 feet tall.
Recreational maths with 21155401638405
- 21155401638405 backwards is 50483610455112
- 21155401638405 is a
Harshad number . - The number of decimal digits it has is: 14
- The sum of 21155401638405's digits is 45
- More coming soon!
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