18082193808 has 40 divisors (see below), whose sum is σ = 53385525568. Its totient is φ = 5166340992.

The previous prime is 18082193807. The next prime is 18082193821. The reversal of 18082193808 is 80839128081.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18082193807) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26907691 + ... + 26908362.

Almost surely, 2^18082193808 is an apocalyptic number.

It is an amenable number.

18082193808 is an abundant number, since it is smaller than the sum of its proper divisors (35303331760).

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

18082193808 is a wasteful number, since it uses less digits than its factorization.

18082193808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53816071 (or 53816065 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 48.

The spelling of 18082193808 in words is "eighteen billion, eighty-two million, one hundred ninety-three thousand, eight hundred eight".