18222889344 has 128 divisors (see below), whose sum is σ = 53038368000. Its totient is φ = 5497681920.

The previous prime is 18222889337. The next prime is 18222889369. The reversal of 18222889344 is 44398822281.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957877 + ... + 976715.

It is an arithmetic number, because the mean of its divisors is an integer number (414362250).

Almost surely, 2^18222889344 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 18222889344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26519184000).

18222889344 is an abundant number, since it is smaller than the sum of its proper divisors (34815478656).

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

18222889344 is a wasteful number, since it uses less digits than its factorization.

18222889344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19096 (or 19084 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 51.

The spelling of 18222889344 in words is "eighteen billion, two hundred twenty-two million, eight hundred eighty-nine thousand, three hundred forty-four".