18618313866 has 16 divisors (see below), whose sum is σ = 37302076800. Its totient is φ = 6195196448.

The previous prime is 18618313843. The next prime is 18618313951. The reversal of 18618313866 is 66831381681.

It is a super-2 number, since 2×18618313866² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2723346 + ... + 2730173.

It is an arithmetic number, because the mean of its divisors is an integer number (2331379800).

Almost surely, 2^18618313866 is an apocalyptic number.

18618313866 is an abundant number, since it is smaller than the sum of its proper divisors (18683762934).

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

18618313866 is a wasteful number, since it uses less digits than its factorization.

18618313866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454093.

The product of its digits is 995328, while the sum is 51.

The spelling of 18618313866 in words is "eighteen billion, six hundred eighteen million, three hundred thirteen thousand, eight hundred sixty-six".