18385517064 has 16 divisors (see below), whose sum is σ = 45963792720. Its totient is φ = 6128505680.

The previous prime is 18385516997. The next prime is 18385517093. The reversal of 18385517064 is 46071558381.

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, 383031582 + ... + 383031629.

It is an arithmetic number, because the mean of its divisors is an integer number (2872737045).

Almost surely, 2^18385517064 is an apocalyptic number.

It is an amenable number.

18385517064 is an abundant number, since it is smaller than the sum of its proper divisors (27578275656).

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

18385517064 is a wasteful number, since it uses less digits than its factorization.

18385517064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766063220 (or 766063216 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 18385517064 in words is "eighteen billion, three hundred eighty-five million, five hundred seventeen thousand, sixty-four".