18143319488 has 112 divisors (see below), whose sum is σ = 43861939200. Its totient is φ = 7272944640.

The previous prime is 18143319473. The next prime is 18143319553. The reversal of 18143319488 is 88491334181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

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, 658958 + ... + 685938.

Almost surely, 2^18143319488 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 18143319488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21930969600).

18143319488 is an abundant number, since it is smaller than the sum of its proper divisors (25718619712).

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

18143319488 is a wasteful number, since it uses less digits than its factorization.

18143319488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27098 (or 27088 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The spelling of 18143319488 in words is "eighteen billion, one hundred forty-three million, three hundred nineteen thousand, four hundred eighty-eight".