20323131311 has 16 divisors (see below), whose sum is σ = 23986003968. Its totient is φ = 16850635200.

The previous prime is 20323131277. The next prime is 20323131319. The reversal of 20323131311 is 11313132302.

It is not a de Polignac number, because 20323131311 - 2³⁰ = 19249389487 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 (20323131319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517706 + ... + 555576.

It is an arithmetic number, because the mean of its divisors is an integer number (1499125248).

Almost surely, 2^20323131311 is an apocalyptic number.

20323131311 is a deficient number, since it is larger than the sum of its proper divisors (3662872657).

20323131311 is a wasteful number, since it uses less digits than its factorization.

20323131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40382.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20323131311 its reverse (11313132302), we get a palindrome (31636263613).

Subtracting from 20323131311 its reverse (11313132302), we obtain a palindrome (9009999009).

The spelling of 20323131311 in words is "twenty billion, three hundred twenty-three million, one hundred thirty-one thousand, three hundred eleven".