20131323324311 has 4 divisors (see below), whose sum is σ = 20131581850632. Its totient is φ = 20131064797992.

The previous prime is 20131323324269. The next prime is 20131323324323. The reversal of 20131323324311 is 11342332313102.

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 20131323324311 - 2²² = 20131319130007 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 (20131323324331) 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, 129146321 + ... + 129302106.

It is an arithmetic number, because the mean of its divisors is an integer number (5032895462658).

Almost surely, 2^{20131323324311} is an apocalyptic number.

20131323324311 is a deficient number, since it is larger than the sum of its proper divisors (258526321).

20131323324311 is an equidigital number, since it uses as much as digits as its factorization.

20131323324311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258526320.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 20131323324311 its reverse (11342332313102), we get a palindrome (31473655637413).

The spelling of 20131323324311 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-four thousand, three hundred eleven".