20641871250 has 960 divisors, whose sum is σ = 79030702080. Its totient is φ = 3875040000.

The previous prime is 20641871183. The next prime is 20641871273. The reversal of 20641871250 is 5217814602.

20641871250 is a `hidden beast` number, since 2 + 0 + 641 + 8 + 7 + 1 + 2 + 5 + 0 = 666.

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 479 ways as a sum of consecutive naturals, for example, 439188727 + ... + 439188773.

It is an arithmetic number, because the mean of its divisors is an integer number (82323648).

Almost surely, 2^20641871250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20641871250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39515351040).

20641871250 is an abundant number, since it is smaller than the sum of its proper divisors (58388830830).

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

20641871250 is a wasteful number, since it uses less digits than its factorization.

20641871250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 20641871250 in words is "twenty billion, six hundred forty-one million, eight hundred seventy-one thousand, two hundred fifty".