20875728408245 has 16 divisors (see below), whose sum is σ = 25273877428800. Its totient is φ = 16551929205504.

The previous prime is 20875728408229. The next prime is 20875728408277. The reversal of 20875728408245 is 54280482757802.

It is a cyclic number.

It is not a de Polignac number, because 20875728408245 - 2⁴ = 20875728408229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10025306 + ... + 11927204.

It is an arithmetic number, because the mean of its divisors is an integer number (1579617339300).

Almost surely, 2^{20875728408245} is an apocalyptic number.

It is an amenable number.

20875728408245 is a deficient number, since it is larger than the sum of its proper divisors (4398149020555).

20875728408245 is a wasteful number, since it uses less digits than its factorization.

20875728408245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921444.

The product of its (nonzero) digits is 80281600, while the sum is 62.

The spelling of 20875728408245 in words is "twenty trillion, eight hundred seventy-five billion, seven hundred twenty-eight million, four hundred eight thousand, two hundred forty-five".