18549623632 has 20 divisors (see below), whose sum is σ = 36090279360. Its totient is φ = 9236003168.

The previous prime is 18549623537. The next prime is 18549623641. The reversal of 18549623632 is 23632694581.

It is a congruent number.

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, 2421598 + ... + 2429245.

It is an arithmetic number, because the mean of its divisors is an integer number (1804513968).

Almost surely, 2^18549623632 is an apocalyptic number.

It is an amenable number.

18549623632 is a deficient number, since it is larger than the sum of its proper divisors (17540655728).

18549623632 is a wasteful number, since it uses less digits than its factorization.

18549623632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851090 (or 4851084 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The spelling of 18549623632 in words is "eighteen billion, five hundred forty-nine million, six hundred twenty-three thousand, six hundred thirty-two".