18264404 has 12 divisors (see below), whose sum is σ = 32101524. Its totient is φ = 9092544.

The previous prime is 18264397. The next prime is 18264427. The reversal of 18264404 is 40446281.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 12974404 = 2300^2 + 3602^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8867 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (2675127).

Almost surely, 2^18264404 is an apocalyptic number.

It is an amenable number.

18264404 is a deficient number, since it is larger than the sum of its proper divisors (13837120).

18264404 is a wasteful number, since it uses less digits than its factorization.

18264404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19834 (or 19832 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 18264404 is about 4273.6874008285. The cubic root of 18264404 is about 263.3511191676.

The spelling of 18264404 in words is "eighteen million, two hundred sixty-four thousand, four hundred four".