20320323 has 4 divisors (see below), whose sum is σ = 27093768. Its totient is φ = 13546880.

The previous prime is 20320303. The next prime is 20320343. The reversal of 20320323 is 32302302.

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

It is an interprime number because it is at equal distance from previous prime (20320303) and next prime (20320343).

It is a cyclic number.

It is not a de Polignac number, because 20320323 - 2¹² = 20316227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20320303) 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, 3386718 + ... + 3386723.

It is an arithmetic number, because the mean of its divisors is an integer number (6773442).

Almost surely, 2^20320323 is an apocalyptic number.

20320323 is a deficient number, since it is larger than the sum of its proper divisors (6773445).

20320323 is an equidigital number, since it uses as much as digits as its factorization.

20320323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773444.

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 20320323 is about 4507.8068947106. The cubic root of 20320323 is about 272.8832438245.

Adding to 20320323 its reverse (32302302), we get a palindrome (52622625).

The spelling of 20320323 in words is "twenty million, three hundred twenty thousand, three hundred twenty-three".