20653556204523 has 32 divisors (see below), whose sum is σ = 31140370022400. Its totient is φ = 12062838362400.

The previous prime is 20653556204513. The next prime is 20653556204551. The reversal of 20653556204523 is 32540265535602.

It is not a de Polignac number, because 20653556204523 - 2¹⁸ = 20653555942379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20653556204513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41992333 + ... + 42481326.

It is an arithmetic number, because the mean of its divisors is an integer number (973136563200).

Almost surely, 2^{20653556204523} is an apocalyptic number.

20653556204523 is a deficient number, since it is larger than the sum of its proper divisors (10486813817877).

20653556204523 is a wasteful number, since it uses less digits than its factorization.

20653556204523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84473943.

The product of its (nonzero) digits is 6480000, while the sum is 48.

The spelling of 20653556204523 in words is "twenty trillion, six hundred fifty-three billion, five hundred fifty-six million, two hundred four thousand, five hundred twenty-three".