18708668889 has 16 divisors (see below), whose sum is σ = 25624370112. Its totient is φ = 12134965248.

The previous prime is 18708668879. The next prime is 18708668893. The reversal of 18708668889 is 98886680781.

It is not a de Polignac number, because 18708668889 - 2⁴ = 18708668873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18708668879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249004 + ... + 315309.

It is an arithmetic number, because the mean of its divisors is an integer number (1601523132).

Almost surely, 2^18708668889 is an apocalyptic number.

It is an amenable number.

18708668889 is a deficient number, since it is larger than the sum of its proper divisors (6915701223).

18708668889 is a wasteful number, since it uses less digits than its factorization.

18708668889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564616.

The product of its (nonzero) digits is 74317824, while the sum is 69.

The spelling of 18708668889 in words is "eighteen billion, seven hundred eight million, six hundred sixty-eight thousand, eight hundred eighty-nine".