20641935528 has 96 divisors (see below), whose sum is σ = 57756691200. Its totient is φ = 6653145600.

The previous prime is 20641935527. The next prime is 20641935529. The reversal of 20641935528 is 82553914602.

20641935528 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 1 + 93 + 552 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (20641935527) and next prime (20641935529).

It is not an unprimeable number, because it can be changed into a prime (20641935527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3320343 + ... + 3326553.

It is an arithmetic number, because the mean of its divisors is an integer number (601632200).

Almost surely, 2^20641935528 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 20641935528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28878345600).

20641935528 is an abundant number, since it is smaller than the sum of its proper divisors (37114755672).

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

20641935528 is a wasteful number, since it uses less digits than its factorization.

20641935528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7743 (or 7736 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 20641935528 in words is "twenty billion, six hundred forty-one million, nine hundred thirty-five thousand, five hundred twenty-eight".