18689558752 has 72 divisors (see below), whose sum is σ = 38741037048. Its totient is φ = 8871932160.

The previous prime is 18689558731. The next prime is 18689558773. The reversal of 18689558752 is 25785598681.

It is an interprime number because it is at equal distance from previous prime (18689558731) and next prime (18689558773).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1624123 + ... + 1635589.

It is an arithmetic number, because the mean of its divisors is an integer number (538069959).

Almost surely, 2^18689558752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18689558752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19370518524).

18689558752 is an abundant number, since it is smaller than the sum of its proper divisors (20051478296).

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

18689558752 is a wasteful number, since it uses less digits than its factorization.

18689558752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11592 (or 11553 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 64.

The spelling of 18689558752 in words is "eighteen billion, six hundred eighty-nine million, five hundred fifty-eight thousand, seven hundred fifty-two".