18265659328 has 28 divisors (see below), whose sum is σ = 41423906992. Its totient is φ = 7828139520.

The previous prime is 18265659311. The next prime is 18265659331. The reversal of 18265659328 is 82395656281.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20385333 + ... + 20386228.

Almost surely, 2^18265659328 is an apocalyptic number.

It is an amenable number.

18265659328 is an abundant number, since it is smaller than the sum of its proper divisors (23158247664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18265659328 is an equidigital number, since it uses as much as digits as its factorization.

18265659328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40771580 (or 40771570 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 55.

The spelling of 18265659328 in words is "eighteen billion, two hundred sixty-five million, six hundred fifty-nine thousand, three hundred twenty-eight".