18009446828 has 12 divisors (see below), whose sum is σ = 31679831400. Its totient is φ = 8958066432.

The previous prime is 18009446827. The next prime is 18009446863. The reversal of 18009446828 is 82864490081.

It is not an unprimeable number, because it can be changed into a prime (18009446827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11663378 + ... + 11664921.

It is an arithmetic number, because the mean of its divisors is an integer number (2639985950).

Almost surely, 2^18009446828 is an apocalyptic number.

It is an amenable number.

18009446828 is a deficient number, since it is larger than the sum of its proper divisors (13670384572).

18009446828 is a wasteful number, since it uses less digits than its factorization.

18009446828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23328496 (or 23328494 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 18009446828 in words is "eighteen billion, nine million, four hundred forty-six thousand, eight hundred twenty-eight".