20818306518528 has 80 divisors (see below), whose sum is σ = 56242414647936. Its totient is φ = 6841696942080.

The previous prime is 20818306518509. The next prime is 20818306518623. The reversal of 20818306518528 is 82581560381802.

20818306518528 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95338726 + ... + 95556837.

Almost surely, 2^{20818306518528} is an apocalyptic number.

It is an amenable number.

20818306518528 is an abundant number, since it is smaller than the sum of its proper divisors (35424108129408).

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

20818306518528 is an equidigital number, since it uses as much as digits as its factorization.

20818306518528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190895655 (or 190895639 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 57.

The spelling of 20818306518528 in words is "twenty trillion, eight hundred eighteen billion, three hundred six million, five hundred eighteen thousand, five hundred twenty-eight".