18104003 has 4 divisors (see below), whose sum is σ = 18374280. Its totient is φ = 17833728.

The previous prime is 18103999. The next prime is 18104039. The reversal of 18104003 is 30040181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18104003 - 2² = 18103999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18100003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135038 + ... + 135171.

It is an arithmetic number, because the mean of its divisors is an integer number (4593570).

Almost surely, 2^18104003 is an apocalyptic number.

18104003 is a deficient number, since it is larger than the sum of its proper divisors (270277).

18104003 is an equidigital number, since it uses as much as digits as its factorization.

18104003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270276.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 18104003 is about 4254.8799042981. The cubic root of 18104003 is about 262.5779203297.

Adding to 18104003 its reverse (30040181), we get a palindrome (48144184).

The spelling of 18104003 in words is "eighteen million, one hundred four thousand, three".