18564930844 has 6 divisors (see below), whose sum is σ = 32488628984. Its totient is φ = 9282465420.

The previous prime is 18564930827. The next prime is 18564930851. The reversal of 18564930844 is 44803946581.

It is a junction number, because it is equal to n+sod(n) for n = 18564930791 and 18564930800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2320616352 + ... + 2320616359.

Almost surely, 2^18564930844 is an apocalyptic number.

It is an amenable number.

18564930844 is a deficient number, since it is larger than the sum of its proper divisors (13923698140).

18564930844 is a wasteful number, since it uses less digits than its factorization.

18564930844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641232715 (or 4641232713 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 18564930844 in words is "eighteen billion, five hundred sixty-four million, nine hundred thirty thousand, eight hundred forty-four".