18788004 has 48 divisors (see below), whose sum is σ = 49909440. Its totient is φ = 6108480.

The previous prime is 18787997. The next prime is 18788041. The reversal of 18788004 is 40088781.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18788004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2307 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (1039780).

Almost surely, 2^18788004 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 18788004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24954720).

18788004 is an abundant number, since it is smaller than the sum of its proper divisors (31121436).

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

18788004 is a wasteful number, since it uses less digits than its factorization.

18788004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297 (or 4289 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 18788004 is about 4334.5131214474. The cubic root of 18788004 is about 265.8440112804.

The spelling of 18788004 in words is "eighteen million, seven hundred eighty-eight thousand, four".