21253440
21,253,440 is an even composite number composed of five prime numbers multiplied together.
21253440 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty-eight divisors.
Prime factorization of 21253440:
26 × 3 × 5 × 132 × 131
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 13 × 13 × 131)See below for interesting mathematical facts about the number 21253440 from the Numbermatics database.
Names of 21253440
- Cardinal: 21253440 can be written as Twenty-one million, two hundred fifty-three thousand, four hundred forty.
Scientific notation
- Scientific notation: 2.125344 × 107
Factors of 21253440
Divisors of 21253440
- Number of divisors d(n): 168
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 32 39 40 48 52 60 64 65 78 80 96 104 120 130 131 156 160 169 192 195 208 240 260 262 312 320 338 390 393 416 480 507 520 524 624 655 676 780 786 832 845 960 1014 1040 1048 1248 1310 1352 1560 1572 1690 1703 1965 2028 2080 2096 2496 2535 2620 2704 3120 3144 3380 3406 3930 4056 4160 4192 5070 5109 5240 5408 6240 6288 6760 6812 7860 8112 8384 8515 10140 10218 10480 10816 12480 12576 13520 13624 15720 16224 17030 20280 20436 20960 22139 25152 25545 27040 27248 31440 32448 34060 40560 40872 41920 44278 51090 54080 54496 62880 66417 68120 81120 81744 88556 102180 108992 110695 125760 132834 136240 162240 163488 177112 204360 221390 265668 272480 326976 332085 354224 408720 442780 531336 544960 664170 708448 817440 885560 1062672 1328340 1416896 1634880 1771120 2125344 2656680 3542240 4250688 5313360 7084480 10626720 21253440
- Sum of all divisors σ(n): 73627488
- Sum of proper divisors (its aliquot sum) s(n): 52374048
- 21253440 is an abundant number, because the sum of its proper divisors (52374048) is greater than itself. Its abundance is 31120608
Bases of 21253440
- Binary: 10100010001001101010000002
- Hexadecimal: 0x1444D40
- Base-36: CNJ9C
Squares and roots of 21253440
- 21253440 squared (212534402) is 451708711833600
- 21253440 cubed (212534403) is 9600364004432707584000
-
The
square root of 21253440 is 4610.1453339349 -
The
cube root of 21253440 is 276.9978582467
Scales and comparisons
How big is 21253440?- 21,253,440 seconds is equal to 35 weeks, 23 hours, 44 minutes.
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To count from 1 to 21,253,440 would take you about four days!
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 21253440 cubic inches would be around 23.1 feet tall.
Recreational maths with 21253440
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The information we have on file for 21253440 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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