20323111123 has 8 divisors (see below), whose sum is σ = 23228001792. Its totient is φ = 17418617736.

The previous prime is 20323111079. The next prime is 20323111141. The reversal of 20323111123 is 32111132302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323111123 is a prime.

It is a super-2 number, since 2×20323111123² (a number of 21 digits) contains 22 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 20323111123.

It is not an unprimeable number, because it can be changed into a prime (20323111183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19836 + ... + 202582.

It is an arithmetic number, because the mean of its divisors is an integer number (2903500224).

Almost surely, 2^20323111123 is an apocalyptic number.

20323111123 is a deficient number, since it is larger than the sum of its proper divisors (2904890669).

20323111123 is a wasteful number, since it uses less digits than its factorization.

20323111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198641.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20323111123 its reverse (32111132302), we get a palindrome (52434243425).

The spelling of 20323111123 in words is "twenty billion, three hundred twenty-three million, one hundred eleven thousand, one hundred twenty-three".