| Base | Representation |
|---|---|
| bin | 1001110101100100100000… |
| … | …01010011110000111100000 |
| 3 | 2211120222122111020020212000 |
| 4 | 10322302100022132013200 |
| 5 | 10313404034213412220 |
| 6 | 114001313512404000 |
| 7 | 4361565000616104 |
| oct | 472622012360740 |
| 9 | 84528574206760 |
| 10 | 21631873966560 |
| 11 | 6990031a04350 |
| 12 | 251449a9a6600 |
| 13 | c0bb528bc000 |
| 14 | 54adb9c01904 |
| 15 | 277a6485d390 |
| hex | 13ac9029e1e0 |
21631873966560 has 768 divisors, whose sum is σ = 89474595840000. Its totient is φ = 4840675706880.
The previous prime is 21631873966519. The next prime is 21631873966561. The reversal of 21631873966560 is 6566937813612.
21631873966560 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 1 + 8 + 7 + 3 + 9 + 66 + 560 = 666.
21631873966560 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21631873966561) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 104297841 + ... + 104505039.
It is an arithmetic number, because the mean of its divisors is an integer number (116503380000).
Almost surely, 221631873966560 is an apocalyptic number.
21631873966560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21631873966560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44737297920000).
21631873966560 is an abundant number, since it is smaller than the sum of its proper divisors (67842721873440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21631873966560 is a wasteful number, since it uses less digits than its factorization.
21631873966560 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 207273 (or 207233 counting only the distinct ones).
The product of its (nonzero) digits is 58786560, while the sum is 63.
The spelling of 21631873966560 in words is "twenty-one trillion, six hundred thirty-one billion, eight hundred seventy-three million, nine hundred sixty-six thousand, five hundred sixty".
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