18404684087 has 8 divisors (see below), whose sum is σ = 18835141776. Its totient is φ = 17974337472.

The previous prime is 18404684057. The next prime is 18404684093. The reversal of 18404684087 is 78048640481.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18404684087 - 2²⁸ = 18136248631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18404684027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374933 + ... + 421169.

It is an arithmetic number, because the mean of its divisors is an integer number (2354392722).

Almost surely, 2^18404684087 is an apocalyptic number.

18404684087 is a deficient number, since it is larger than the sum of its proper divisors (430457689).

18404684087 is an equidigital number, since it uses as much as digits as its factorization.

18404684087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55537.

The product of its (nonzero) digits is 1376256, while the sum is 50.

The spelling of 18404684087 in words is "eighteen billion, four hundred four million, six hundred eighty-four thousand, eighty-seven".