20640050752 has 168 divisors, whose sum is σ = 44600774400. Its totient is φ = 9466490880.

The previous prime is 20640050741. The next prime is 20640050789. The reversal of 20640050752 is 25705004602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103718749 + ... + 103718947.

It is an arithmetic number, because the mean of its divisors is an integer number (265480800).

Almost surely, 2^20640050752 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 20640050752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22300387200).

20640050752 is an abundant number, since it is smaller than the sum of its proper divisors (23960723648).

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

20640050752 is a wasteful number, since it uses less digits than its factorization.

20640050752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 20640050752 in words is "twenty billion, six hundred forty million, fifty thousand, seven hundred fifty-two".