18423608 has 48 divisors (see below), whose sum is σ = 41156280. Its totient is φ = 7705152.

The previous prime is 18423599. The next prime is 18423611. The reversal of 18423608 is 80632481.

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, 16310 + ... + 17402.

Almost surely, 2^18423608 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 18423608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20578140).

18423608 is an abundant number, since it is smaller than the sum of its proper divisors (22732672).

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

18423608 is a wasteful number, since it uses less digits than its factorization.

18423608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18423608 is about 4292.2730574836. The cubic root of 18423608 is about 264.1140844545.

The spelling of 18423608 in words is "eighteen million, four hundred twenty-three thousand, six hundred eight".