18336854867 has 4 divisors (see below), whose sum is σ = 18610539336. Its totient is φ = 18063170400.

The previous prime is 18336854777. The next prime is 18336854869. The reversal of 18336854867 is 76845863381.

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-18336854867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336854869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136842134 + ... + 136842267.

It is an arithmetic number, because the mean of its divisors is an integer number (4652634834).

Almost surely, 2^18336854867 is an apocalyptic number.

18336854867 is a deficient number, since it is larger than the sum of its proper divisors (273684469).

18336854867 is an equidigital number, since it uses as much as digits as its factorization.

18336854867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273684468.

The product of its digits is 23224320, while the sum is 59.

The spelling of 18336854867 in words is "eighteen billion, three hundred thirty-six million, eight hundred fifty-four thousand, eight hundred sixty-seven".