18015312366 has 24 divisors (see below), whose sum is σ = 39130532064. Its totient is φ = 5990126400.

The previous prime is 18015312361. The next prime is 18015312389. The reversal of 18015312366 is 66321351081.

It is a self number, because there is not a number n which added to its sum of digits gives 18015312366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18015312361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1240726 + ... + 1255161.

It is an arithmetic number, because the mean of its divisors is an integer number (1630438836).

Almost surely, 2^18015312366 is an apocalyptic number.

18015312366 is an abundant number, since it is smaller than the sum of its proper divisors (21115219698).

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

18015312366 is a wasteful number, since it uses less digits than its factorization.

18015312366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496296 (or 2496293 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 18015312366 in words is "eighteen billion, fifteen million, three hundred twelve thousand, three hundred sixty-six".