20736661528 has 48 divisors (see below), whose sum is σ = 42758659440. Its totient is φ = 9421030080.

The previous prime is 20736661513. The next prime is 20736661567. The reversal of 20736661528 is 82516663702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2558250 + ... + 2566342.

It is an arithmetic number, because the mean of its divisors is an integer number (890805405).

Almost surely, 2^20736661528 is an apocalyptic number.

It is an amenable number.

20736661528 is an abundant number, since it is smaller than the sum of its proper divisors (22021997912).

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

20736661528 is a wasteful number, since it uses less digits than its factorization.

20736661528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10768 (or 10753 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 20736661528 in words is "twenty billion, seven hundred thirty-six million, six hundred sixty-one thousand, five hundred twenty-eight".