18404049 has 8 divisors (see below), whose sum is σ = 25330432. Its totient is φ = 11873520.

The previous prime is 18404041. The next prime is 18404083. The reversal of 18404049 is 94040481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18404049 - 2³ = 18404041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18404041) 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 in 7 ways as a sum of consecutive naturals, for example, 98854 + ... + 99039.

It is an arithmetic number, because the mean of its divisors is an integer number (3166304).

Almost surely, 2^18404049 is an apocalyptic number.

It is an amenable number.

18404049 is a deficient number, since it is larger than the sum of its proper divisors (6926383).

18404049 is a wasteful number, since it uses less digits than its factorization.

18404049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197927.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18404049 is about 4289.9940559399. The cubic root of 18404049 is about 264.0205878113.

The spelling of 18404049 in words is "eighteen million, four hundred four thousand, forty-nine".