20560646264 has 16 divisors (see below), whose sum is σ = 38555286000. Its totient is φ = 10279236672.

The previous prime is 20560646251. The next prime is 20560646317. The reversal of 20560646264 is 46264606502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52364 + ... + 209435.

It is an arithmetic number, because the mean of its divisors is an integer number (2409705375).

Almost surely, 2^20560646264 is an apocalyptic number.

It is an amenable number.

20560646264 is a deficient number, since it is larger than the sum of its proper divisors (17994639736).

20560646264 is a wasteful number, since it uses less digits than its factorization.

20560646264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271622 (or 271618 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20560646264 in words is "twenty billion, five hundred sixty million, six hundred forty-six thousand, two hundred sixty-four".