| Base | Representation |
|---|---|
| bin | 101000100011… |
| … | …1110011100000 |
| 3 | 1111000101222000 |
| 4 | 1101013303200 |
| 5 | 20421000012 |
| 6 | 2035444000 |
| 7 | 345516633 |
| oct | 121076340 |
| 9 | 44011860 |
| 10 | 21265632 |
| 11 | 11005203 |
| 12 | 7156600 |
| 13 | 453751b |
| 14 | 2b77c1a |
| 15 | 1d00ddc |
| hex | 1447ce0 |
21265632 has 96 divisors (see below), whose sum is σ = 62818560. Its totient is φ = 6998400.
The previous prime is 21265631. The next prime is 21265633. The reversal of 21265632 is 23656212.
21265632 is a `hidden beast` number, since 2 + 1 + 2 + 656 + 3 + 2 = 666.
It is an interprime number because it is at equal distance from previous prime (21265631) and next prime (21265633).
It is a tau number, because it is divible by the number of its divisors (96).
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a junction number, because it is equal to n+sod(n) for n = 21265596 and 21265605.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21265631) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130383 + ... + 130545.
It is an arithmetic number, because the mean of its divisors is an integer number (654360).
Almost surely, 221265632 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21265632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31409280).
21265632 is an abundant number, since it is smaller than the sum of its proper divisors (41552928).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21265632 is a wasteful number, since it uses less digits than its factorization.
21265632 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 333 (or 319 counting only the distinct ones).
The product of its digits is 4320, while the sum is 27.
The square root of 21265632 is about 4611.4674454017. The cubic root of 21265632 is about 277.0508145730.
The spelling of 21265632 in words is "twenty-one million, two hundred sixty-five thousand, six hundred thirty-two".
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