18016698508 has 12 divisors (see below), whose sum is σ = 31818482080. Its totient is φ = 8925703632.

The previous prime is 18016698503. The next prime is 18016698521. The reversal of 18016698508 is 80589661081.

It is not an unprimeable number, because it can be changed into a prime (18016698503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20660916 + ... + 20661787.

Almost surely, 2^18016698508 is an apocalyptic number.

It is an amenable number.

18016698508 is a deficient number, since it is larger than the sum of its proper divisors (13801783572).

18016698508 is a wasteful number, since it uses less digits than its factorization.

18016698508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41322816 (or 41322814 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 18016698508 in words is "eighteen billion, sixteen million, six hundred ninety-eight thousand, five hundred eight".