20131323322413 has 4 divisors (see below), whose sum is σ = 26841764429888. Its totient is φ = 13420882214940.

The previous prime is 20131323322381. The next prime is 20131323322531. The reversal of 20131323322413 is 31422332313102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20131323322413 - 2⁵ = 20131323322381 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 (20131323322013) 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, 3355220553733 + ... + 3355220553738.

It is an arithmetic number, because the mean of its divisors is an integer number (6710441107472).

Almost surely, 2^{20131323322413} is an apocalyptic number.

It is an amenable number.

20131323322413 is a deficient number, since it is larger than the sum of its proper divisors (6710441107475).

20131323322413 is an equidigital number, since it uses as much as digits as its factorization.

20131323322413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710441107474.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 20131323322413 its reverse (31422332313102), we get a palindrome (51553655635515).

The spelling of 20131323322413 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-two thousand, four hundred thirteen".