18120819028 has 24 divisors (see below), whose sum is σ = 34944982688. Its totient is φ = 8168954976.

The previous prime is 18120819011. The next prime is 18120819037. The reversal of 18120819028 is 82091802181.

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 7 ways as a sum of consecutive naturals, for example, 4049826 + ... + 4054297.

Almost surely, 2^18120819028 is an apocalyptic number.

It is an amenable number.

18120819028 is a deficient number, since it is larger than the sum of its proper divisors (16824163660).

18120819028 is a wasteful number, since it uses less digits than its factorization.

18120819028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8104183 (or 8104181 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 40.

The spelling of 18120819028 in words is "eighteen billion, one hundred twenty million, eight hundred nineteen thousand, twenty-eight".