18312728808 has 64 divisors (see below), whose sum is σ = 52572441600. Its totient is φ = 5257241280.

The previous prime is 18312728783. The next prime is 18312728839. The reversal of 18312728808 is 80882721381.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1820416 + ... + 1830447.

It is an arithmetic number, because the mean of its divisors is an integer number (821444400).

Almost surely, 2^18312728808 is an apocalyptic number.

It is an amenable number.

18312728808 is an abundant number, since it is smaller than the sum of its proper divisors (34259712792).

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

18312728808 is a wasteful number, since it uses less digits than its factorization.

18312728808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650902 (or 3650898 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The spelling of 18312728808 in words is "eighteen billion, three hundred twelve million, seven hundred twenty-eight thousand, eight hundred eight".