18094688539 has 4 divisors (see below), whose sum is σ = 18109607056. Its totient is φ = 18079770024.

The previous prime is 18094688489. The next prime is 18094688597. The reversal of 18094688539 is 93588649081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18094688539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18094688839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7457439 + ... + 7459864.

It is an arithmetic number, because the mean of its divisors is an integer number (4527401764).

Almost surely, 2^18094688539 is an apocalyptic number.

18094688539 is a deficient number, since it is larger than the sum of its proper divisors (14918517).

18094688539 is a wasteful number, since it uses less digits than its factorization.

18094688539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14918516.

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 18094688539 in words is "eighteen billion, ninety-four million, six hundred eighty-eight thousand, five hundred thirty-nine".