18385517028 has 24 divisors (see below), whose sum is σ = 43172789632. Its totient is φ = 6089469984.

The previous prime is 18385516997. The next prime is 18385517093. The reversal of 18385517028 is 82071558381.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4877500 + ... + 4881267.

Almost surely, 2^18385517028 is an apocalyptic number.

It is an amenable number.

18385517028 is an abundant number, since it is smaller than the sum of its proper divisors (24787272604).

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

18385517028 is a wasteful number, since it uses less digits than its factorization.

18385517028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9758931 (or 9758929 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 18385517028 in words is "eighteen billion, three hundred eighty-five million, five hundred seventeen thousand, twenty-eight".