20323123 has 4 divisors (see below), whose sum is σ = 20436840. Its totient is φ = 20209408.

The previous prime is 20323091. The next prime is 20323139. The reversal of 20323123 is 32132302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20323123 - 2⁵ = 20323091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323097 and 20323106.

It is not an unprimeable number, because it can be changed into a prime (20323183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56590 + ... + 56947.

It is an arithmetic number, because the mean of its divisors is an integer number (5109210).

Almost surely, 2^20323123 is an apocalyptic number.

20323123 is a deficient number, since it is larger than the sum of its proper divisors (113717).

20323123 is a wasteful number, since it uses less digits than its factorization.

20323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113716.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20323123 is about 4508.1174563225. The cubic root of 20323123 is about 272.8957770568.

Adding to 20323123 its reverse (32132302), we get a palindrome (52455425).

The spelling of 20323123 in words is "twenty million, three hundred twenty-three thousand, one hundred twenty-three".