20592189568 has 64 divisors (see below), whose sum is σ = 42315338520. Its totient is φ = 9974292480.

The previous prime is 20592189523. The next prime is 20592189581. The reversal of 20592189568 is 86598129502.

It can be written as a sum of positive squares in 4 ways, for example, as 14668116544 + 5924073024 = 121112^2 + 76968^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094158 + ... + 1112818.

Almost surely, 2^20592189568 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 20592189568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21157669260).

20592189568 is an abundant number, since it is smaller than the sum of its proper divisors (21723148952).

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

20592189568 is a wasteful number, since it uses less digits than its factorization.

20592189568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18945 (or 18933 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 20592189568 in words is "twenty billion, five hundred ninety-two million, one hundred eighty-nine thousand, five hundred sixty-eight".