20311100311 has 4 divisors (see below), whose sum is σ = 20325809224. Its totient is φ = 20296391400.

The previous prime is 20311100261. The next prime is 20311100321. The reversal of 20311100311 is 11300111302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20311100311 - 2⁹ = 20311099799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311100291 and 20311100300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311100321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7352385 + ... + 7355146.

It is an arithmetic number, because the mean of its divisors is an integer number (5081452306).

Almost surely, 2^20311100311 is an apocalyptic number.

20311100311 is a deficient number, since it is larger than the sum of its proper divisors (14708913).

20311100311 is a wasteful number, since it uses less digits than its factorization.

20311100311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14708912.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20311100311 its reverse (11300111302), we get a palindrome (31611211613).

The spelling of 20311100311 in words is "twenty billion, three hundred eleven million, one hundred thousand, three hundred eleven".