18539094815 has 8 divisors (see below), whose sum is σ = 22247888208. Its totient is φ = 14830626240.

The previous prime is 18539094811. The next prime is 18539094839. The reversal of 18539094815 is 51849093581.

It is a happy number.

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

It is not a de Polignac number, because 18539094815 - 2² = 18539094811 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 (18539094811) 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, 69944 + ... + 204866.

It is an arithmetic number, because the mean of its divisors is an integer number (2780986026).

Almost surely, 2^18539094815 is an apocalyptic number.

18539094815 is a deficient number, since it is larger than the sum of its proper divisors (3708793393).

18539094815 is a wasteful number, since it uses less digits than its factorization.

18539094815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162409.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 18539094815 in words is "eighteen billion, five hundred thirty-nine million, ninety-four thousand, eight hundred fifteen".