18225804 has 48 divisors (see below), whose sum is σ = 44593920. Its totient is φ = 5785920.

The previous prime is 18225791. The next prime is 18225811. The reversal of 18225804 is 40852281.

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, 28569 + ... + 29199.

It is an arithmetic number, because the mean of its divisors is an integer number (929040).

Almost surely, 2^18225804 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 18225804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22296960).

18225804 is an abundant number, since it is smaller than the sum of its proper divisors (26368116).

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

18225804 is a wasteful number, since it uses less digits than its factorization.

18225804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 18225804 is about 4269.1690057902. The cubic root of 18225804 is about 263.1654661934.

It can be divided in two parts, 1822 and 5804, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 18225804 in words is "eighteen million, two hundred twenty-five thousand, eight hundred four".