Base | Representation |
---|---|
bin | 10100000000110010… |
… | …001101111001110001 |
3 | 2001110112110112101000 |
4 | 110000302031321301 |
5 | 323001412010000 |
6 | 13512122232213 |
7 | 1360330664100 |
oct | 240062157161 |
9 | 61415415330 |
10 | 21488000625 |
11 | 9127463a03 |
12 | 41b8355669 |
13 | 2045a58290 |
14 | 107bb84037 |
15 | 85b6e5000 |
hex | 500c8de71 |
21488000625 has 240 divisors, whose sum is σ = 49859040000. Its totient is φ = 9062928000.
The previous prime is 21488000621. The next prime is 21488000669. The reversal of 21488000625 is 52600088412.
21488000625 is a `hidden beast` number, since 21 + 4 + 8 + 8 + 0 + 0 + 0 + 625 = 666.
It is not a de Polignac number, because 21488000625 - 22 = 21488000621 is a prime.
It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 21488000625 = 1453 + 27803 = 9303 + 27453.
It is a self number, because there is not a number n which added to its sum of digits gives 21488000625.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21488000621) by changing a digit.
It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 10748376 + ... + 10750374.
It is an arithmetic number, because the mean of its divisors is an integer number (207746000).
Almost surely, 221488000625 is an apocalyptic number.
21488000625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
21488000625 is an abundant number, since it is smaller than the sum of its proper divisors (28371039375).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21488000625 is a wasteful number, since it uses less digits than its factorization.
21488000625 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2055 (or 2027 counting only the distinct ones).
The product of its (nonzero) digits is 30720, while the sum is 36.
The spelling of 21488000625 in words is "twenty-one billion, four hundred eighty-eight million, six hundred twenty-five", and thus it is an aban number.
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