20200565728 has 48 divisors (see below), whose sum is σ = 47018573280. Its totient is φ = 8358852096.

The previous prime is 20200565717. The next prime is 20200565747. The reversal of 20200565728 is 82756500202.

It is a congruent number.

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, 1548351 + ... + 1561342.

It is an arithmetic number, because the mean of its divisors is an integer number (979553610).

Almost surely, 2^20200565728 is an apocalyptic number.

20200565728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20200565728 is an abundant number, since it is smaller than the sum of its proper divisors (26818007552).

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

20200565728 is a wasteful number, since it uses less digits than its factorization.

20200565728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109739 (or 3109731 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 20200565728 in words is "twenty billion, two hundred million, five hundred sixty-five thousand, seven hundred twenty-eight".