18363818384 has 20 divisors (see below), whose sum is σ = 35932177500. Its totient is φ = 9090998400.

The previous prime is 18363818377. The next prime is 18363818411. The reversal of 18363818384 is 48381836381.

It can be written as a sum of positive squares in 2 ways, for example, as 17457808384 + 906010000 = 132128^2 + 30100^2 .

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, 5680259 + ... + 5683490.

It is an arithmetic number, because the mean of its divisors is an integer number (1796608875).

Almost surely, 2^18363818384 is an apocalyptic number.

It is an amenable number.

18363818384 is a deficient number, since it is larger than the sum of its proper divisors (17568359116).

18363818384 is a wasteful number, since it uses less digits than its factorization.

18363818384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363858 (or 11363852 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 53.

The spelling of 18363818384 in words is "eighteen billion, three hundred sixty-three million, eight hundred eighteen thousand, three hundred eighty-four".