18404686871 has 8 divisors (see below), whose sum is σ = 19234589184. Its totient is φ = 17577259480.

The previous prime is 18404686849. The next prime is 18404686877. The reversal of 18404686871 is 17868640481.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18404686871 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 (18404686877) 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, 603515 + ... + 633276.

It is an arithmetic number, because the mean of its divisors is an integer number (2404323648).

Almost surely, 2^18404686871 is an apocalyptic number.

18404686871 is a deficient number, since it is larger than the sum of its proper divisors (829902313).

18404686871 is a wasteful number, since it uses less digits than its factorization.

18404686871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237461.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 18404686871 in words is "eighteen billion, four hundred four million, six hundred eighty-six thousand, eight hundred seventy-one".