18816284138 has 8 divisors (see below), whose sum is σ = 28397582688. Its totient is φ = 9350423244.

The previous prime is 18816284111. The next prime is 18816284159. The reversal of 18816284138 is 83148261881.

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

It is an unprimeable number.

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, 28859006 + ... + 28859657.

It is an arithmetic number, because the mean of its divisors is an integer number (3549697836).

Almost surely, 2^18816284138 is an apocalyptic number.

18816284138 is a deficient number, since it is larger than the sum of its proper divisors (9581298550).

18816284138 is a wasteful number, since it uses less digits than its factorization.

18816284138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57718828.

The product of its digits is 589824, while the sum is 50.

The spelling of 18816284138 in words is "eighteen billion, eight hundred sixteen million, two hundred eighty-four thousand, one hundred thirty-eight".