20855041655 has 12 divisors (see below), whose sum is σ = 29111936040. Its totient is φ = 14300599824.

The previous prime is 20855041639. The next prime is 20855041657. The reversal of 20855041655 is 55614055802.

It is not a de Polignac number, because 20855041655 - 2⁴ = 20855041639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20855041657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42561065 + ... + 42561554.

It is an arithmetic number, because the mean of its divisors is an integer number (2425994670).

Almost surely, 2^20855041655 is an apocalyptic number.

20855041655 is a deficient number, since it is larger than the sum of its proper divisors (8256894385).

20855041655 is an equidigital number, since it uses as much as digits as its factorization.

20855041655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85122638 (or 85122631 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 20855041655 in words is "twenty billion, eight hundred fifty-five million, forty-one thousand, six hundred fifty-five".