18493038684 has 36 divisors (see below), whose sum is σ = 47886449520. Its totient is φ = 6013995840.

The previous prime is 18493038671. The next prime is 18493038691. The reversal of 18493038684 is 48683039481.

18493038684 is a `hidden beast` number, since 184 + 9 + 3 + 0 + 386 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18493038684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6263104 + ... + 6266055.

Almost surely, 2^18493038684 is an apocalyptic number.

It is an amenable number.

18493038684 is an abundant number, since it is smaller than the sum of its proper divisors (29393410836).

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

18493038684 is a wasteful number, since it uses less digits than its factorization.

18493038684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12529210 (or 12529205 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 18493038684 in words is "eighteen billion, four hundred ninety-three million, thirty-eight thousand, six hundred eighty-four".