18105204 has 48 divisors (see below), whose sum is σ = 48178368. Its totient is φ = 5242368.

The previous prime is 18105179. The next prime is 18105223. The reversal of 18105204 is 40250181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (1003716).

Almost surely, 2^18105204 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 18105204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24089184).

18105204 is an abundant number, since it is smaller than the sum of its proper divisors (30073164).

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

18105204 is a wasteful number, since it uses less digits than its factorization.

18105204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6864 (or 6862 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18105204 is about 4255.0210340256. The cubic root of 18105204 is about 262.5837265798.

Adding to 18105204 its reverse (40250181), we get a palindrome (58355385).

The spelling of 18105204 in words is "eighteen million, one hundred five thousand, two hundred four".