18530442564 has 48 divisors (see below), whose sum is σ = 44452507008. Its totient is φ = 6003618048.

The previous prime is 18530442529. The next prime is 18530442577. The reversal of 18530442564 is 46524403581.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415224 + ... + 457680.

It is an arithmetic number, because the mean of its divisors is an integer number (926093896).

Almost surely, 2^18530442564 is an apocalyptic number.

It is an amenable number.

18530442564 is an abundant number, since it is smaller than the sum of its proper divisors (25922064444).

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

18530442564 is a wasteful number, since it uses less digits than its factorization.

18530442564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43484 (or 43482 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 18530442564 in words is "eighteen billion, five hundred thirty million, four hundred forty-two thousand, five hundred sixty-four".