18404041 has 2 divisors, whose sum is σ = 18404042. Its totient is φ = 18404040.

The previous prime is 18404021. The next prime is 18404083. The reversal of 18404041 is 14040481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10017225 + 8386816 = 3165^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 18404041 - 2⁹ = 18403529 is a prime.

It is not a weakly prime, because it can be changed into another prime (18404021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9202020 + 9202021.

It is an arithmetic number, because the mean of its divisors is an integer number (9202021).

Almost surely, 2^18404041 is an apocalyptic number.

It is an amenable number.

18404041 is a deficient number, since it is larger than the sum of its proper divisors (1).

18404041 is an equidigital number, since it uses as much as digits as its factorization.

18404041 is an odious number, because the sum of its binary digits is odd.

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

The square root of 18404041 is about 4289.9931235376. The cubic root of 18404041 is about 264.0205495559.

The spelling of 18404041 in words is "eighteen million, four hundred four thousand, forty-one".