20563565240536 has 32 divisors (see below), whose sum is σ = 40100007528000. Its totient is φ = 9877264989696.

The previous prime is 20563565240483. The next prime is 20563565240593. The reversal of 20563565240536 is 63504256536502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 439669681 + ... + 439716448.

It is an arithmetic number, because the mean of its divisors is an integer number (1253125235250).

Almost surely, 2^{20563565240536} is an apocalyptic number.

It is an amenable number.

20563565240536 is a deficient number, since it is larger than the sum of its proper divisors (19536442287464).

20563565240536 is a wasteful number, since it uses less digits than its factorization.

20563565240536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879386251 (or 879386247 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 52.

The spelling of 20563565240536 in words is "twenty trillion, five hundred sixty-three billion, five hundred sixty-five million, two hundred forty thousand, five hundred thirty-six".