18126404 has 12 divisors (see below), whose sum is σ = 31862544. Its totient is φ = 9022824.

The previous prime is 18126401. The next prime is 18126419. The reversal of 18126404 is 40462181.

It is not an unprimeable number, because it can be changed into a prime (18126401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9074 + ... + 10889.

It is an arithmetic number, because the mean of its divisors is an integer number (2655212).

Almost surely, 2^18126404 is an apocalyptic number.

It is an amenable number.

18126404 is a deficient number, since it is larger than the sum of its proper divisors (13736140).

18126404 is a wasteful number, since it uses less digits than its factorization.

18126404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20194 (or 20192 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18126404 is about 4257.5114797262. The cubic root of 18126404 is about 262.6861760126.

Adding to 18126404 its reverse (40462181), we get a palindrome (58588585).

The spelling of 18126404 in words is "eighteen million, one hundred twenty-six thousand, four hundred four".