18400324 has 12 divisors (see below), whose sum is σ = 34094844. Its totient is φ = 8658944.

The previous prime is 18400313. The next prime is 18400351. The reversal of 18400324 is 42300481.

It can be written as a sum of positive squares in 2 ways, for example, as 5569600 + 12830724 = 2360^2 + 3582^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18400295 and 18400304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135229 + ... + 135364.

It is an arithmetic number, because the mean of its divisors is an integer number (2841237).

Almost surely, 2^18400324 is an apocalyptic number.

It is an amenable number.

18400324 is a deficient number, since it is larger than the sum of its proper divisors (15694520).

18400324 is a wasteful number, since it uses less digits than its factorization.

18400324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270614 (or 270612 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 18400324 is about 4289.5598841839. The cubic root of 18400324 is about 264.0027739225.

The spelling of 18400324 in words is "eighteen million, four hundred thousand, three hundred twenty-four".