18685508124 has 96 divisors (see below), whose sum is σ = 46345062400. Its totient is φ = 5842964160.

The previous prime is 18685508111. The next prime is 18685508159. The reversal of 18685508124 is 42180558681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23039679 + ... + 23040489.

Almost surely, 2^18685508124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18685508124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23172531200).

18685508124 is an abundant number, since it is smaller than the sum of its proper divisors (27659554276).

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

18685508124 is a wasteful number, since it uses less digits than its factorization.

18685508124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 48.

The spelling of 18685508124 in words is "eighteen billion, six hundred eighty-five million, five hundred eight thousand, one hundred twenty-four".