20524536645136 has 20 divisors (see below), whose sum is σ = 42105483265212. Its totient is φ = 9658605479936.

The previous prime is 20524536645127. The next prime is 20524536645139. The reversal of 20524536645136 is 63154663542502.

It can be written as a sum of positive squares in 2 ways, for example, as 12676448160000 + 7848088485136 = 3560400^2 + 2801444^2 .

It is not an unprimeable number, because it can be changed into a prime (20524536645139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37728927385 + ... + 37728927928.

Almost surely, 2^{20524536645136} is an apocalyptic number.

It is an amenable number.

20524536645136 is an abundant number, since it is smaller than the sum of its proper divisors (21580946620076).

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

20524536645136 is a wasteful number, since it uses less digits than its factorization.

20524536645136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75457855338 (or 75457855332 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 52.

The spelling of 20524536645136 in words is "twenty trillion, five hundred twenty-four billion, five hundred thirty-six million, six hundred forty-five thousand, one hundred thirty-six".