18665257632 has 96 divisors (see below), whose sum is σ = 56019124224. Its totient is φ = 5330707200.

The previous prime is 18665257621. The next prime is 18665257649. The reversal of 18665257632 is 23675256681.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2274657 + ... + 2282847.

It is an arithmetic number, because the mean of its divisors is an integer number (583532544).

Almost surely, 2^18665257632 is an apocalyptic number.

18665257632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18665257632 is an abundant number, since it is smaller than the sum of its proper divisors (37353866592).

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

18665257632 is a wasteful number, since it uses less digits than its factorization.

18665257632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11602 (or 11594 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The spelling of 18665257632 in words is "eighteen billion, six hundred sixty-five million, two hundred fifty-seven thousand, six hundred thirty-two".