20323431232313 has 4 divisors (see below), whose sum is σ = 22171015889808. Its totient is φ = 18475846574820.

The previous prime is 20323431232303. The next prime is 20323431232337. The reversal of 20323431232313 is 31323213432302.

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 a cyclic number.

It is not a de Polignac number, because 20323431232313 - 2¹⁸ = 20323430970169 is a prime.

It is a super-3 number, since 3×20323431232313³ (a number of 41 digits) contains 333 as substring.

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 20323431232313.

It is not an unprimeable number, because it can be changed into a prime (20323431232303) 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, 923792328731 + ... + 923792328752.

It is an arithmetic number, because the mean of its divisors is an integer number (5542753972452).

Almost surely, 2^{20323431232313} is an apocalyptic number.

It is an amenable number.

20323431232313 is a deficient number, since it is larger than the sum of its proper divisors (1847584657495).

20323431232313 is a wasteful number, since it uses less digits than its factorization.

20323431232313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847584657494.

The product of its (nonzero) digits is 46656, while the sum is 32.

Adding to 20323431232313 its reverse (31323213432302), we get a palindrome (51646644664615).

The spelling of 20323431232313 in words is "twenty trillion, three hundred twenty-three billion, four hundred thirty-one million, two hundred thirty-two thousand, three hundred thirteen".