20311020311 has 16 divisors (see below), whose sum is σ = 21614085600. Its totient is φ = 19031760000.

The previous prime is 20311020277. The next prime is 20311020337. The reversal of 20311020311 is 11302011302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311020311 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 (20311022311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2046461 + ... + 2056361.

It is an arithmetic number, because the mean of its divisors is an integer number (1350880350).

Almost surely, 2^20311020311 is an apocalyptic number.

20311020311 is a deficient number, since it is larger than the sum of its proper divisors (1303065289).

20311020311 is a wasteful number, since it uses less digits than its factorization.

20311020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20311020311 its reverse (11302011302), we get a palindrome (31613031613).

Subtracting from 20311020311 its reverse (11302011302), we obtain a palindrome (9009009009).

The spelling of 20311020311 in words is "twenty billion, three hundred eleven million, twenty thousand, three hundred eleven".