20313323013 has 4 divisors (see below), whose sum is σ = 27084430688. Its totient is φ = 13542215340.

The previous prime is 20313322993. The next prime is 20313323059. The reversal of 20313323013 is 31032331302.

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 20313323013 - 2⁹ = 20313322501 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 (20313323083) 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, 3385553833 + ... + 3385553838.

It is an arithmetic number, because the mean of its divisors is an integer number (6771107672).

Almost surely, 2^20313323013 is an apocalyptic number.

It is an amenable number.

20313323013 is a deficient number, since it is larger than the sum of its proper divisors (6771107675).

20313323013 is an equidigital number, since it uses as much as digits as its factorization.

20313323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771107674.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 20313323013 its reverse (31032331302), we get a palindrome (51345654315).

The spelling of 20313323013 in words is "twenty billion, three hundred thirteen million, three hundred twenty-three thousand, thirteen".