18316478386 has 8 divisors (see below), whose sum is σ = 27482400684. Its totient is φ = 9155678160.

The previous prime is 18316478347. The next prime is 18316478393. The reversal of 18316478386 is 68387461381.

It can be written as a sum of positive squares in 2 ways, for example, as 18273902761 + 42575625 = 135181^2 + 6525^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271565 + ... + 1285888.

Almost surely, 2^18316478386 is an apocalyptic number.

18316478386 is a deficient number, since it is larger than the sum of its proper divisors (9165922298).

18316478386 is a wasteful number, since it uses less digits than its factorization.

18316478386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561036.

The product of its digits is 4644864, while the sum is 55.

The spelling of 18316478386 in words is "eighteen billion, three hundred sixteen million, four hundred seventy-eight thousand, three hundred eighty-six".