18028723896 has 96 divisors (see below), whose sum is σ = 50205417600. Its totient is φ = 5840398080.

The previous prime is 18028723883. The next prime is 18028723897. The reversal of 18028723896 is 69832782081.

It is a happy number.

18028723896 is a `hidden beast` number, since 180 + 2 + 87 + 2 + 389 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028723897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2636610 + ... + 2643438.

It is an arithmetic number, because the mean of its divisors is an integer number (522973100).

Almost surely, 2^18028723896 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 18028723896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25102708800).

18028723896 is an abundant number, since it is smaller than the sum of its proper divisors (32176693704).

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

18028723896 is a wasteful number, since it uses less digits than its factorization.

18028723896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7869 (or 7862 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 18028723896 in words is "eighteen billion, twenty-eight million, seven hundred twenty-three thousand, eight hundred ninety-six".