20311011323013 has 4 divisors (see below), whose sum is σ = 27081348430688. Its totient is φ = 13540674215340.

The previous prime is 20311011322981. The next prime is 20311011323027. The reversal of 20311011323013 is 31032311011302.

It is a happy number.

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 20311011323013 - 2⁵ = 20311011322981 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 (20311010323013) 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, 3385168553833 + ... + 3385168553838.

It is an arithmetic number, because the mean of its divisors is an integer number (6770337107672).

Almost surely, 2^{20311011323013} is an apocalyptic number.

It is an amenable number.

20311011323013 is a deficient number, since it is larger than the sum of its proper divisors (6770337107675).

20311011323013 is an equidigital number, since it uses as much as digits as its factorization.

20311011323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770337107674.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 20311011323013 its reverse (31032311011302), we get a palindrome (51343322334315).

The spelling of 20311011323013 in words is "twenty trillion, three hundred eleven billion, eleven million, three hundred twenty-three thousand, thirteen".