20535584641 has 32 divisors (see below), whose sum is σ = 24347151360. Its totient is φ = 17075016000.

The previous prime is 20535584609. The next prime is 20535584647. The reversal of 20535584641 is 14648553502.

It is a cyclic number.

It is not a de Polignac number, because 20535584641 - 2⁵ = 20535584609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20535584647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19538566 + ... + 19539616.

It is an arithmetic number, because the mean of its divisors is an integer number (760848480).

Almost surely, 2^20535584641 is an apocalyptic number.

It is an amenable number.

20535584641 is a deficient number, since it is larger than the sum of its proper divisors (3811566719).

20535584641 is a wasteful number, since it uses less digits than its factorization.

20535584641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 20535584641 in words is "twenty billion, five hundred thirty-five million, five hundred eighty-four thousand, six hundred forty-one".