21551829390

Names of 21551829390

• Cardinal: 21551829390 can be written as Twenty-one billion, five hundred fifty-one million, eight hundred twenty-nine thousand, three hundred ninety.

Scientific notation

• Scientific notation: 2.155182939 × 10¹⁰

Factors of 21551829390

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 8213

Divisors of 21551829390

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 5 6 7 9 10 13 14 15 17 18 19 21 26 30 34 35 38 39 42 45 51 57 63 65 70 78 85 90 91 95 102 105 114 117 119 126 130 133 153 170 171 182 190 195 210 221 234 238 247 255 266 273 285 306 315 323 342 357 390 399 442 455 494 510 546 570 585 595 630 646 663 665 714 741 765 798 819 855 910 969 1071 1105 1170 1190 1197 1235 1326 1330 1365 1482 1530 1547 1615 1638 1710 1729 1785 1938 1989 1995 2142 2210 2223 2261 2394 2470 2730 2907 3094 3230 3315 3458 3570 3705 3978 3990 4095 4199 4446 4522 4641 4845 5187 5355 5814 5985 6630 6783 7410 7735 8147 8190 8398 8645 9282 9690 9945 10374 10710 11115 11305 11970 12597 13566 13923 14535 15470 15561 16294 17290 19890 20349 20995 22230 22610 23205 24441 25194 25935 27846 29070 29393 31122 33915 37791 40698 40735 41990 46410 48882 51870 57029 58786 62985 67830 69615 73323 75582 77805 81470 88179 101745 105911 114058 122205 125970 138499 139230 146646 146965 154793 155610 171087 176358 188955 203490 211822 244410 264537 276998 285145 293930 309586 317733 342174 366615 377910 415497 440895 464379 513261 529074 529555 570290 635466 692495 733230 741377 773965 830994 855435 881790 928758 953199 969493 1026522 1059110 1083551 1246491 1322685 1384990 1393137 1482754 1547930 1588665 1710870 1800487 1906398 1938986 2012309 2077485 2167102 2224131 2321895 2492982 2566305 2631481 2645370 2786274 2908479 3177330 3250653 3600974 3706885 4024618 4154970 4448262 4643790 4765995 4847465 5132610 5262962 5401461 5417755 5816958 6036927 6232455 6501306 6672393 6965685 7413770 7894443 8725437 9002435 9531990 9694930 9751959 10061545 10802922 10835510 11120655 12073854 12464910 12603409 13157405 13344786 13931370 14086163 14542395 15788886 16204383 16253265 17450874 18004870 18110781 18420367 19503918 20123090 22241310 23683329 25206818 26314810 27007305 28172326 29084790 30184635 32408766 32506530 33361965 34209253 36221562 36840734 37810227 39472215 42258489 43627185 47366658 48759795 54014610 55261101 60369270 63017045 66723930 68418506 70430815 75620454 78944430 81021915 84516978 87254370 90553905 92101835 97519590 102627759 110522202 113430681 118416645 126034090 126775467 140861630 162043830 165783303 171046265 181107810 184203670 189051135 205255518 211292445 226861362 236833290 239464771 253550934 276305505 307883277 331566606 342092530 378102270 422584890 478929542 513138795 552611010 567153405 615766554 633877335 718394313 828916515 1026277590 1134306810 1197323855 1267754670 1436788626 1539416385 1657833030 2155182939 2394647710 3078832770 3591971565 4310365878 7183943130 10775914695 21551829390
• Sum of all divisors σ(n): 76875402240
• Sum of proper divisors (its aliquot sum) s(n): 55323572850
• 21551829390 is an abundant number, because the sum of its proper divisors (55323572850) is greater than itself. Its abundance is 33771743460

Bases of 21551829390

• Binary: 10100000100100101101101000110001110₂
• Hexadecimal: 0x50496D18E
• Base-36: 9WFEHZI

Squares and roots of 21551829390

• 21551829390 squared (21551829390²) is 464481350055667772100
• 21551829390 cubed (21551829390³) is 10010422811236618826820602019000
• The square root of 21551829390 is 146805.4133538677
• The cube root of 21551829390 is 2782.8814984893

Scales and comparisons

• 21,551,829,390 seconds is equal to 685 years, 14 weeks, 4 days, 11 hours, 16 minutes, 30 seconds.
• To count from 1 to 21,551,829,390 would take you about one thousand, three hundred seventy 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 21551829390 cubic inches would be around 231.9 feet tall.

Recreational maths with 21551829390

• 21551829390 backwards is 09392815512
• 21551829390 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21551829390's digits is 45
• More coming soon!