18426004 has 6 divisors (see below), whose sum is σ = 32245514. Its totient is φ = 9213000.

The previous prime is 18425999. The next prime is 18426017. The reversal of 18426004 is 40062481.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 21904 = 4290^2 + 148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18426004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2303247 + ... + 2303254.

Almost surely, 2^18426004 is an apocalyptic number.

It is an amenable number.

18426004 is a deficient number, since it is larger than the sum of its proper divisors (13819510).

18426004 is a wasteful number, since it uses less digits than its factorization.

18426004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606505 (or 4606503 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 18426004 is about 4292.5521546045. The cubic root of 18426004 is about 264.1255333505.

Adding to 18426004 its reverse (40062481), we get a palindrome (58488485).

The spelling of 18426004 in words is "eighteen million, four hundred twenty-six thousand, four".