18387104 has 12 divisors (see below), whose sum is σ = 36199674. Its totient is φ = 9193536.

The previous prime is 18387091. The next prime is 18387121. The reversal of 18387104 is 40178381.

It can be written as a sum of positive squares in only one way, i.e., 14592400 + 3794704 = 3820^2 + 1948^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 574597 = 18387104 / (1 + 8 + 3 + 8 + 7 + 1 + 0 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287267 + ... + 287330.

Almost surely, 2^18387104 is an apocalyptic number.

It is an amenable number.

18387104 is a deficient number, since it is larger than the sum of its proper divisors (17812570).

18387104 is an equidigital number, since it uses as much as digits as its factorization.

18387104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574607 (or 574599 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18387104 is about 4288.0186566758. The cubic root of 18387104 is about 263.9395331367.

The spelling of 18387104 in words is "eighteen million, three hundred eighty-seven thousand, one hundred four".