20585139055136 has 12 divisors (see below), whose sum is σ = 40526992514862. Its totient is φ = 10292569527552.

The previous prime is 20585139055087. The next prime is 20585139055153. The reversal of 20585139055136 is 63155093158502.

It can be written as a sum of positive squares in only one way, i.e., 15943889280400 + 4641249774736 = 3992980^2 + 2154356^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321642797705 + ... + 321642797768.

Almost surely, 2^{20585139055136} is an apocalyptic number.

It is an amenable number.

20585139055136 is a deficient number, since it is larger than the sum of its proper divisors (19941853459726).

20585139055136 is an equidigital number, since it uses as much as digits as its factorization.

20585139055136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643285595483 (or 643285595475 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 20585139055136 in words is "twenty trillion, five hundred eighty-five billion, one hundred thirty-nine million, fifty-five thousand, one hundred thirty-six".