20311165055 has 16 divisors (see below), whose sum is σ = 25810830144. Its totient is φ = 15290918400.

The previous prime is 20311165051. The next prime is 20311165067. The reversal of 20311165055 is 55056111302.

It is not a de Polignac number, because 20311165055 - 2² = 20311165051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311165051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815030 + ... + 839580.

It is an arithmetic number, because the mean of its divisors is an integer number (1613176884).

Almost surely, 2^20311165055 is an apocalyptic number.

20311165055 is a deficient number, since it is larger than the sum of its proper divisors (5499665089).

20311165055 is a wasteful number, since it uses less digits than its factorization.

20311165055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34306.

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 20311165055 its reverse (55056111302), we get a palindrome (75367276357).

The spelling of 20311165055 in words is "twenty billion, three hundred eleven million, one hundred sixty-five thousand, fifty-five".