20790521584 has 80 divisors (see below), whose sum is σ = 46502612928. Its totient is φ = 8820320256.

The previous prime is 20790521567. The next prime is 20790521599. The reversal of 20790521584 is 48512509702.

It is a self number, because there is not a number n which added to its sum of digits gives 20790521584.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6089862 + ... + 6093274.

Almost surely, 2^20790521584 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 20790521584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23251306464).

20790521584 is an abundant number, since it is smaller than the sum of its proper divisors (25712091344).

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

20790521584 is a wasteful number, since it uses less digits than its factorization.

20790521584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962 (or 3956 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 20790521584 in words is "twenty billion, seven hundred ninety million, five hundred twenty-one thousand, five hundred eighty-four".