18312728806 has 8 divisors (see below), whose sum is σ = 27934671240. Its totient is φ = 9001171728.

The previous prime is 18312728783. The next prime is 18312728839. The reversal of 18312728806 is 60882721381.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77596191 + ... + 77596426.

It is an arithmetic number, because the mean of its divisors is an integer number (3491833905).

Almost surely, 2^18312728806 is an apocalyptic number.

18312728806 is a deficient number, since it is larger than the sum of its proper divisors (9621942434).

18312728806 is a wasteful number, since it uses less digits than its factorization.

18312728806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155192678.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 18312728806 in words is "eighteen billion, three hundred twelve million, seven hundred twenty-eight thousand, eight hundred six".