20430323 has 2 divisors, whose sum is σ = 20430324. Its totient is φ = 20430322.

The previous prime is 20430307. The next prime is 20430349. The reversal of 20430323 is 32303402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20430323 - 2⁴ = 20430307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20430353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215161 + 10215162.

It is an arithmetic number, because the mean of its divisors is an integer number (10215162).

Almost surely, 2^20430323 is an apocalyptic number.

20430323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430323 is an equidigital number, since it uses as much as digits as its factorization.

20430323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 20430323 is about 4519.9914822929. The cubic root of 20430323 is about 273.3747575859.

Adding to 20430323 its reverse (32303402), we get a palindrome (52733725).

The spelling of 20430323 in words is "twenty million, four hundred thirty thousand, three hundred twenty-three".