18818216318 has 8 divisors (see below), whose sum is σ = 30793444920. Its totient is φ = 8553734680.

The previous prime is 18818216309. The next prime is 18818216357. The reversal of 18818216318 is 81361281881.

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

It is a super-3 number, since 3×18818216318³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427686713 + ... + 427686756.

It is an arithmetic number, because the mean of its divisors is an integer number (3849180615).

Almost surely, 2^18818216318 is an apocalyptic number.

18818216318 is a deficient number, since it is larger than the sum of its proper divisors (11975228602).

18818216318 is a wasteful number, since it uses less digits than its factorization.

18818216318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855373482.

The product of its digits is 147456, while the sum is 47.

The spelling of 18818216318 in words is "eighteen billion, eight hundred eighteen million, two hundred sixteen thousand, three hundred eighteen".