18122404 has 6 divisors (see below), whose sum is σ = 31714214. Its totient is φ = 9061200.

The previous prime is 18122399. The next prime is 18122431. The reversal of 18122404 is 40422181.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 1557504 = 4070^2 + 1248^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2265297 + ... + 2265304.

Almost surely, 2^18122404 is an apocalyptic number.

It is an amenable number.

18122404 is a deficient number, since it is larger than the sum of its proper divisors (13591810).

18122404 is a wasteful number, since it uses less digits than its factorization.

18122404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530605 (or 4530603 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 18122404 is about 4257.0416958259. The cubic root of 18122404 is about 262.6668520474. Note that the first 3 decimals are identical.

Adding to 18122404 its reverse (40422181), we get a palindrome (58544585).

The spelling of 18122404 in words is "eighteen million, one hundred twenty-two thousand, four hundred four".