18872604 has 54 divisors (see below), whose sum is σ = 49920416. Its totient is φ = 6011280.

The previous prime is 18872603. The next prime is 18872621. The reversal of 18872604 is 40627881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872603) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18549 + ... + 19539.

Almost surely, 2^18872604 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 18872604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24960208).

18872604 is an abundant number, since it is smaller than the sum of its proper divisors (31047812).

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

18872604 is a wasteful number, since it uses less digits than its factorization.

18872604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 18872604 is about 4344.2610418804. The cubic root of 18872604 is about 266.2424344871.

The spelling of 18872604 in words is "eighteen million, eight hundred seventy-two thousand, six hundred four".