18404322 has 16 divisors (see below), whose sum is σ = 37313760. Its totient is φ = 6050592.

The previous prime is 18404317. The next prime is 18404327. The reversal of 18404322 is 22340481.

It is an interprime number because it is at equal distance from previous prime (18404317) and next prime (18404327).

It is a junction number, because it is equal to n+sod(n) for n = 18404292 and 18404301.

It is not an unprimeable number, because it can be changed into a prime (18404327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20572 + ... + 21447.

It is an arithmetic number, because the mean of its divisors is an integer number (2332110).

Almost surely, 2^18404322 is an apocalyptic number.

18404322 is an abundant number, since it is smaller than the sum of its proper divisors (18909438).

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

18404322 is a wasteful number, since it uses less digits than its factorization.

18404322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42097.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 18404322 is about 4290.0258740478. The cubic root of 18404322 is about 264.0218932716.

The spelling of 18404322 in words is "eighteen million, four hundred four thousand, three hundred twenty-two".