18553994708 has 12 divisors (see below), whose sum is σ = 32505295872. Its totient is φ = 9266767320.

The previous prime is 18553994689. The next prime is 18553994743. The reversal of 18553994708 is 80749935581.

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, 2553428 + ... + 2560683.

It is an arithmetic number, because the mean of its divisors is an integer number (2708774656).

Almost surely, 2^18553994708 is an apocalyptic number.

It is an amenable number.

18553994708 is a deficient number, since it is larger than the sum of its proper divisors (13951301164).

18553994708 is a wasteful number, since it uses less digits than its factorization.

18553994708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115022 (or 5115020 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 18553994708 in words is "eighteen billion, five hundred fifty-three million, nine hundred ninety-four thousand, seven hundred eight".