18181819800216 has 96 divisors (see below), whose sum is σ = 50974893141120. Its totient is φ = 5848487884800.

The previous prime is 18181819800203. The next prime is 18181819800223. The reversal of 18181819800216 is 61200891818181.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 10750315 + ... + 12326106.

It is an arithmetic number, because the mean of its divisors is an integer number (530988470220).

Almost surely, 2^{18181819800216} is an apocalyptic number.

It is an amenable number.

18181819800216 is an abundant number, since it is smaller than the sum of its proper divisors (32793073340904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18181819800216 is a wasteful number, since it uses less digits than its factorization.

18181819800216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23076817 (or 23076810 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 54.

The spelling of 18181819800216 in words is "eighteen trillion, one hundred eighty-one billion, eight hundred nineteen million, eight hundred thousand, two hundred sixteen".