20559052528 has 80 divisors (see below), whose sum is σ = 46438902720. Its totient is φ = 8634931200.

The previous prime is 20559052523. The next prime is 20559052529. The reversal of 20559052528 is 82525095502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20559052523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1914438 + ... + 1925146.

It is an arithmetic number, because the mean of its divisors is an integer number (580486284).

Almost surely, 2^20559052528 is an apocalyptic number.

20559052528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20559052528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23219451360).

20559052528 is an abundant number, since it is smaller than the sum of its proper divisors (25879850192).

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

20559052528 is a wasteful number, since it uses less digits than its factorization.

20559052528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066 (or 11060 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 20559052528 in words is "twenty billion, five hundred fifty-nine million, fifty-two thousand, five hundred twenty-eight".