18678604 has 36 divisors (see below), whose sum is σ = 38329536. Its totient is φ = 7941024.

The previous prime is 18678593. The next prime is 18678607. The reversal of 18678604 is 40687681.

It is not an unprimeable number, because it can be changed into a prime (18678607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30469 + ... + 31075.

Almost surely, 2^18678604 is an apocalyptic number.

18678604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18678604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19164768).

18678604 is an abundant number, since it is smaller than the sum of its proper divisors (19650932).

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

18678604 is a wasteful number, since it uses less digits than its factorization.

18678604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 18678604 is about 4321.8750560376. The cubic root of 18678604 is about 265.3270153009.

The spelling of 18678604 in words is "eighteen million, six hundred seventy-eight thousand, six hundred four".