18543285966 has 32 divisors (see below), whose sum is σ = 38724013440. Its totient is φ = 5912172896.

The previous prime is 18543285949. The next prime is 18543285979. The reversal of 18543285966 is 66958234581.

It is a congruent number.

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, 479376 + ... + 516611.

It is an arithmetic number, because the mean of its divisors is an integer number (1210125420).

Almost surely, 2^18543285966 is an apocalyptic number.

18543285966 is an abundant number, since it is smaller than the sum of its proper divisors (20180727474).

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

18543285966 is a wasteful number, since it uses less digits than its factorization.

18543285966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996128.

The product of its digits is 12441600, while the sum is 57.

The spelling of 18543285966 in words is "eighteen billion, five hundred forty-three million, two hundred eighty-five thousand, nine hundred sixty-six".