18309442828 has 24 divisors (see below), whose sum is σ = 33844321280. Its totient is φ = 8653372560.

The previous prime is 18309442817. The next prime is 18309442829. The reversal of 18309442828 is 82824490381.

It is not an unprimeable number, because it can be changed into a prime (18309442829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711608 + ... + 1722271.

Almost surely, 2^18309442828 is an apocalyptic number.

It is an amenable number.

18309442828 is a deficient number, since it is larger than the sum of its proper divisors (15534878452).

18309442828 is a wasteful number, since it uses less digits than its factorization.

18309442828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433957 (or 3433955 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 18309442828 in words is "eighteen billion, three hundred nine million, four hundred forty-two thousand, eight hundred twenty-eight".