18092720128 has 68 divisors (see below), whose sum is σ = 41355521920. Its totient is φ = 7753826304.

The previous prime is 18092720099. The next prime is 18092720147. The reversal of 18092720128 is 82102729081.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439033 + ... + 478471.

It is an arithmetic number, because the mean of its divisors is an integer number (608169440).

Almost surely, 2^18092720128 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 18092720128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20677760960).

18092720128 is an abundant number, since it is smaller than the sum of its proper divisors (23262801792).

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

18092720128 is an frugal number, since it uses more digits than its factorization.

18092720128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39478 (or 39448 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 18092720128 in words is "eighteen billion, ninety-two million, seven hundred twenty thousand, one hundred twenty-eight".