21153440
21,153,440 is an even composite number composed of six prime numbers multiplied together.
21153440 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 21153440:
25 × 5 × 7 × 11 × 17 × 101
(2 × 2 × 2 × 2 × 2 × 5 × 7 × 11 × 17 × 101)See below for interesting mathematical facts about the number 21153440 from the Numbermatics database.
Names of 21153440
- Cardinal: 21153440 can be written as Twenty-one million, one hundred fifty-three thousand, four hundred forty.
Scientific notation
- Scientific notation: 2.115344 × 107
Factors of 21153440
Divisors of 21153440
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 4 5 7 8 10 11 14 16 17 20 22 28 32 34 35 40 44 55 56 68 70 77 80 85 88 101 110 112 119 136 140 154 160 170 176 187 202 220 224 238 272 280 308 340 352 374 385 404 440 476 505 544 560 595 616 680 707 748 770 808 880 935 952 1010 1111 1120 1190 1232 1309 1360 1414 1496 1540 1616 1717 1760 1870 1904 2020 2222 2380 2464 2618 2720 2828 2992 3080 3232 3434 3535 3740 3808 4040 4444 4760 5236 5555 5656 5984 6160 6545 6868 7070 7480 7777 8080 8585 8888 9520 10472 11110 11312 12019 12320 13090 13736 14140 14960 15554 16160 17170 17776 18887 19040 20944 22220 22624 24038 26180 27472 28280 29920 31108 34340 35552 37774 38885 41888 44440 48076 52360 54944 56560 60095 62216 68680 75548 77770 88880 94435 96152 104720 113120 120190 124432 132209 137360 151096 155540 177760 188870 192304 209440 240380 248864 264418 274720 302192 311080 377740 384608 480760 528836 604384 622160 661045 755480 961520 1057672 1244320 1322090 1510960 1923040 2115344 2644180 3021920 4230688 5288360 10576720 21153440
- Sum of all divisors σ(n): 66624768
- Sum of proper divisors (its aliquot sum) s(n): 45471328
- 21153440 is an abundant number, because the sum of its proper divisors (45471328) is greater than itself. Its abundance is 24317888
Bases of 21153440
- Binary: 10100001011000110101000002
- Hexadecimal: 0x142C6A0
- Base-36: CLE3K
Squares and roots of 21153440
- 21153440 squared (211534402) is 447468023833600
- 21153440 cubed (211534403) is 9465487994082627584000
-
The
square root of 21153440 is 4599.2869012489 -
The
cube root of 21153440 is 276.5627389849
Scales and comparisons
How big is 21153440?- 21,153,440 seconds is equal to 34 weeks, 6 days, 19 hours, 57 minutes, 20 seconds.
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To count from 1 to 21,153,440 would take you about three 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 21153440 cubic inches would be around 23 feet tall.
Recreational maths with 21153440
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