20320111323 has 12 divisors (see below), whose sum is σ = 30627414480. Its totient is φ = 12957752016.

The previous prime is 20320111309. The next prime is 20320111333. The reversal of 20320111323 is 32311102302.

20320111323 is a `hidden beast` number, since 20 + 320 + 1 + 1 + 1 + 323 = 666.

It is not a de Polignac number, because 20320111323 - 2¹³ = 20320103131 is a prime.

It is a super-2 number, since 2×20320111323² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20320111296 and 20320111305.

It is not an unprimeable number, because it can be changed into a prime (20320111303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49082188 + ... + 49082601.

It is an arithmetic number, because the mean of its divisors is an integer number (2552284540).

Almost surely, 2^20320111323 is an apocalyptic number.

20320111323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20320111323 is a deficient number, since it is larger than the sum of its proper divisors (10307303157).

20320111323 is a wasteful number, since it uses less digits than its factorization.

20320111323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98164818 (or 98164815 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20320111323 its reverse (32311102302), we get a palindrome (52631213625).

The spelling of 20320111323 in words is "twenty billion, three hundred twenty million, one hundred eleven thousand, three hundred twenty-three".