18869604 has 96 divisors (see below), whose sum is σ = 50709120. Its totient is φ = 5419008.

The previous prime is 18869581. The next prime is 18869623. The reversal of 18869604 is 40696881.

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, 194484 + ... + 194580.

It is an arithmetic number, because the mean of its divisors is an integer number (528220).

Almost surely, 2^18869604 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 18869604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25354560).

18869604 is an abundant number, since it is smaller than the sum of its proper divisors (31839516).

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

18869604 is a wasteful number, since it uses less digits than its factorization.

18869604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 18869604 is about 4343.9157450393. The cubic root of 18869604 is about 266.2283263893.

The spelling of 18869604 in words is "eighteen million, eight hundred sixty-nine thousand, six hundred four".