20311213323 has 8 divisors (see below), whose sum is σ = 27084961600. Its totient is φ = 13539136968.

The previous prime is 20311213319. The next prime is 20311213367. The reversal of 20311213323 is 32331211302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20311213323 - 2² = 20311213319 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 20311213323.

It is not an unprimeable number, because it can be changed into a prime (20311213303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389353 + ... + 438426.

It is an arithmetic number, because the mean of its divisors is an integer number (3385620200).

Almost surely, 2^20311213323 is an apocalyptic number.

20311213323 is a deficient number, since it is larger than the sum of its proper divisors (6773748277).

20311213323 is an equidigital number, since it uses as much as digits as its factorization.

20311213323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835961.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20311213323 its reverse (32331211302), we get a palindrome (52642424625).

The spelling of 20311213323 in words is "twenty billion, three hundred eleven million, two hundred thirteen thousand, three hundred twenty-three".