18104405 has 32 divisors (see below), whose sum is σ = 25557120. Its totient is φ = 12207360.

The previous prime is 18104389. The next prime is 18104407. The reversal of 18104405 is 50440181.

It is not a de Polignac number, because 18104405 - 2⁴ = 18104389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18104407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270182 + ... + 270248.

It is an arithmetic number, because the mean of its divisors is an integer number (798660).

Almost surely, 2^18104405 is an apocalyptic number.

It is an amenable number.

18104405 is a deficient number, since it is larger than the sum of its proper divisors (7452715).

18104405 is an equidigital number, since it uses as much as digits as its factorization.

18104405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 18104405 is about 4254.9271439121. The cubic root of 18104405 is about 262.5798638325.

Adding to 18104405 its reverse (50440181), we get a palindrome (68544586).

The spelling of 18104405 in words is "eighteen million, one hundred four thousand, four hundred five".