18811654068 has 12 divisors (see below), whose sum is σ = 43893859520. Its totient is φ = 6270551352.

The previous prime is 18811654063. The next prime is 18811654087. The reversal of 18811654068 is 86045611881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18811654063) 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, 783818908 + ... + 783818931.

Almost surely, 2^18811654068 is an apocalyptic number.

It is an amenable number.

18811654068 is an abundant number, since it is smaller than the sum of its proper divisors (25082205452).

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

18811654068 is a wasteful number, since it uses less digits than its factorization.

18811654068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567637846 (or 1567637844 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 18811654068 in words is "eighteen billion, eight hundred eleven million, six hundred fifty-four thousand, sixty-eight".