21397904388
21,397,904,388 is an even composite number composed of seven prime numbers multiplied together.
21397904388 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.
Prime factorization of 21397904388:
22 × 32 × 7 × 29 × 89 × 167 × 197
(2 × 2 × 3 × 3 × 7 × 29 × 89 × 167 × 197)See below for interesting mathematical facts about the number 21397904388 from the Numbermatics database.
Names of 21397904388
- Cardinal: 21397904388 can be written as Twenty-one billion, three hundred ninety-seven million, nine hundred four thousand, three hundred eighty-eight.
Scientific notation
- Scientific notation: 2.1397904388 × 1010
Factors of 21397904388
Divisors of 21397904388
- Number of divisors d(n): 288
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Complete list of divisors:
1 2 3 4 6 7 9 12 14 18 21 28 29 36 42 58 63 84 87 89 116 126 167 174 178 197 203 252 261 267 334 348 356 394 406 501 522 534 591 609 623 668 788 801 812 1002 1044 1068 1169 1182 1218 1246 1379 1503 1602 1773 1827 1869 2004 2338 2364 2436 2492 2581 2758 3006 3204 3507 3546 3654 3738 4137 4676 4843 5162 5516 5607 5713 6012 7014 7092 7308 7476 7743 8274 9686 10324 10521 11214 11426 12411 14028 14529 14863 15486 16548 17139 17533 18067 19372 21042 22428 22852 23229 24822 29058 29726 30972 32899 33901 34278 35066 36134 39991 42084 43587 44589 46458 49644 51417 52599 54201 58116 59452 65798 67802 68556 70132 72268 79982 87174 89178 92916 98697 101703 102834 104041 105198 108402 119973 122731 131596 133767 135604 157797 159964 162603 174348 178356 197394 203406 205668 208082 210396 216804 230293 239946 245462 267534 296091 305109 312123 315594 325206 359919 368193 394788 406812 416164 431027 460586 479892 490924 508457 535068 592182 610218 624246 631188 650412 690879 719838 736386 862054 921172 936369 954071 1016914 1104579 1184364 1220436 1248492 1293081 1381758 1439676 1472772 1525371 1724108 1872738 1908142 2033828 2072637 2209158 2586162 2763516 2862213 2928011 3017189 3050742 3559199 3745476 3816284 3879243 4145274 4418316 4576113 5172324 5724426 5856022 6034378 6101484 6678497 7118398 7758486 8290548 8586639 8784033 9051567 9152226 10677597 11448852 11712044 12068756 13356994 14236796 15516972 17173278 17568066 18103134 18304452 20035491 20496077 21355194 26352099 26713988 27154701 32032791 34346556 35136132 36206268 40070982 40992154 42710388 52704198 54309402 60106473 61488231 64065582 80141964 81984308 84912319 105408396 108618804 120212946 122976462 128131164 169824638 184464693 240425892 245952924 254736957 339649276 368929386 509473914 594386233 737858772 764210871 1018947828 1188772466 1528421742 1783158699 2377544932 3056843484 3566317398 5349476097 7132634796 10698952194 21397904388
- Sum of all divisors σ(n): 65383718400
- Sum of proper divisors (its aliquot sum) s(n): 43985814012
- 21397904388 is an abundant number, because the sum of its proper divisors (43985814012) is greater than itself. Its abundance is 22587909624
Bases of 21397904388
- Binary: 100111110110110101000011100000001002
- Hexadecimal: 0x4FB6A1C04
- Base-36: 9TVRCP0
Squares and roots of 21397904388
- 21397904388 squared (213979043882) is 457870312197989654544
- 21397904388 cubed (213979043883) is 9797465162516292753745661739072
-
The
square root of 21397904388 is 146280.2255535587 -
The
cube root of 21397904388 is 2776.2404707777
Scales and comparisons
How big is 21397904388?- 21,397,904,388 seconds is equal to 680 years, 20 weeks, 22 hours, 19 minutes, 48 seconds.
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To count from 1 to 21,397,904,388 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 21397904388 cubic inches would be around 231.4 feet tall.
Recreational maths with 21397904388
- 21397904388 backwards is 88340979312
- The number of decimal digits it has is: 11
- The sum of 21397904388's digits is 54
- More coming soon!
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