18068198724 has 81 divisors (see below), whose sum is σ = 46849162269. Its totient is φ = 5871378240.

The previous prime is 18068198623. The next prime is 18068198737. The reversal of 18068198724 is 42789186081.

The square root of 18068198724 is 134418.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5181408324 + 12886790400 = 71982^2 + 113520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34679584 + ... + 34680104.

Almost surely, 2^18068198724 is an apocalyptic number.

18068198724 is the 134418-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18068198724

18068198724 is an abundant number, since it is smaller than the sum of its proper divisors (28780963545).

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

18068198724 is an equidigital number, since it uses as much as digits as its factorization.

18068198724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 18068198724 in words is "eighteen billion, sixty-eight million, one hundred ninety-eight thousand, seven hundred twenty-four".