20323011311 has 4 divisors (see below), whose sum is σ = 20356492992. Its totient is φ = 20289529632.

The previous prime is 20323011307. The next prime is 20323011337. The reversal of 20323011311 is 11311032302.

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 20323011311 - 2² = 20323011307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20323011311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323011011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16739930 + ... + 16741143.

It is an arithmetic number, because the mean of its divisors is an integer number (5089123248).

Almost surely, 2^20323011311 is an apocalyptic number.

20323011311 is a deficient number, since it is larger than the sum of its proper divisors (33481681).

20323011311 is an equidigital number, since it uses as much as digits as its factorization.

20323011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33481680.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20323011311 its reverse (11311032302), we get a palindrome (31634043613).

The spelling of 20323011311 in words is "twenty billion, three hundred twenty-three million, eleven thousand, three hundred eleven".