18684399327 has 8 divisors (see below), whose sum is σ = 27177308160. Its totient is φ = 11323878360.

The previous prime is 18684399289. The next prime is 18684399373. The reversal of 18684399327 is 72399348681.

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

It is not a de Polignac number, because 18684399327 - 2²³ = 18676010719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18684399397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283096927 + ... + 283096992.

It is an arithmetic number, because the mean of its divisors is an integer number (3397163520).

Almost surely, 2^18684399327 is an apocalyptic number.

18684399327 is a deficient number, since it is larger than the sum of its proper divisors (8492908833).

18684399327 is a wasteful number, since it uses less digits than its factorization.

18684399327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566193933.

The product of its digits is 15676416, while the sum is 60.

The spelling of 18684399327 in words is "eighteen billion, six hundred eighty-four million, three hundred ninety-nine thousand, three hundred twenty-seven".