21382742745
21,382,742,745 is an odd composite number composed of six prime numbers multiplied together.
21382742745 is an odd composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.
Prime factorization of 21382742745:
33 × 5 × 72 × 132 × 31 × 617
(3 × 3 × 3 × 5 × 7 × 7 × 13 × 13 × 31 × 617)See below for interesting mathematical facts about the number 21382742745 from the Numbermatics database.
Names of 21382742745
- Cardinal: 21382742745 can be written as Twenty-one billion, three hundred eighty-two million, seven hundred forty-two thousand, seven hundred forty-five.
Scientific notation
- Scientific notation: 2.1382742745 × 1010
Factors of 21382742745
Divisors of 21382742745
- Number of divisors d(n): 288
-
Complete list of divisors:
1 3 5 7 9 13 15 21 27 31 35 39 45 49 63 65 91 93 105 117 135 147 155 169 189 195 217 245 273 279 315 351 403 441 455 465 507 585 617 637 651 735 819 837 845 945 1085 1183 1209 1323 1365 1395 1519 1521 1755 1851 1911 1953 2015 2205 2457 2535 2821 3085 3185 3255 3549 3627 4095 4185 4319 4557 4563 5239 5553 5733 5859 5915 6045 6615 7595 7605 8021 8281 8463 9255 9555 9765 10647 10881 12285 12957 13671 14105 15717 16659 17199 17745 18135 19127 19747 21595 22785 22815 24063 24843 25389 26195 27765 28665 29295 30233 31941 36673 38871 40105 41013 41405 42315 47151 53235 54405 56147 57381 59241 64785 68355 72189 74529 76167 78585 83295 85995 90699 95635 98735 104273 110019 116613 120315 124215 126945 133889 141453 151165 159705 168441 172143 177723 183365 194355 205065 216567 223587 235755 248651 256711 272097 280735 286905 296205 312819 330057 360945 372645 380835 393029 401667 453495 505323 516429 521365 533169 550095 583065 669445 707265 729911 745953 770133 816291 842205 860715 888615 937223 938457 990171 1082835 1117935 1179087 1205001 1243255 1283555 1360485 1515969 1564095 1650285 1740557 1965145 2008335 2189733 2237859 2310399 2526615 2582145 2665845 2811669 2815371 3232463 3537261 3615003 3649555 3729765 3850665 4081455 4686115 4692285 4950855 5109377 5221671 5895435 6025005 6569199 6713577 6931197 7579845 8435007 8702785 9697389 10611783 10948665 11189295 11551995 12183899 14058345 14076855 15328131 15665013 16162315 17686305 18075015 19707597 22627241 25305021 25546885 26108355 29092167 32845995 33567885 34655985 36551697 42175035 45984393 46995039 48486945 53058915 60919495 67881723 76640655 78325065 87276501 98537985 109655091 113136205 126525105 137953179 145460835 158390687 182758485 203645169 229921965 234975195 328965273 339408615 436382505 475172061 548275455 610935507 689765895 791953435 1018225845 1425516183 1644826365 2375860305 3054677535 4276548549 7127580915 21382742745
- Sum of all divisors σ(n): 49508029440
- Sum of proper divisors (its aliquot sum) s(n): 28125286695
- 21382742745 is an abundant number, because the sum of its proper divisors (28125286695) is greater than itself. Its abundance is 6742543950
Bases of 21382742745
- Binary: 100111110101000001011000010110110012
- Hexadecimal: 0x4FA82C2D9
- Base-36: 9TMQDW9
Squares and roots of 21382742745
- 21382742745 squared (213827427452) is 457221687298850135025
- 21382742745 cubed (213827427453) is 9776653716946146371548089143625
-
The
square root of 21382742745 is 146228.3924038009 -
The
cube root of 21382742745 is 2775.5846072927
Scales and comparisons
How big is 21382742745?- 21,382,742,745 seconds is equal to 679 years, 47 weeks, 10 hours, 45 minutes, 45 seconds.
-
To count from 1 to 21,382,742,745 would take you about one thousand, three hundred fifty-nine 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 21382742745 cubic inches would be around 231.3 feet tall.
Recreational maths with 21382742745
- 21382742745 backwards is 54724728312
- 21382742745 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21382742745's digits is 45
- More coming soon!
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