20323423 has 2 divisors, whose sum is σ = 20323424. Its totient is φ = 20323422.

The previous prime is 20323379. The next prime is 20323427. The reversal of 20323423 is 32432302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20323423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20323427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161711 + 10161712.

It is an arithmetic number, because the mean of its divisors is an integer number (10161712).

Almost surely, 2^20323423 is an apocalyptic number.

20323423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323423 is an equidigital number, since it uses as much as digits as its factorization.

20323423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 20323423 is about 4508.1507295120. The cubic root of 20323423 is about 272.8971198349.

Adding to 20323423 its reverse (32432302), we get a palindrome (52755725).

The spelling of 20323423 in words is "twenty million, three hundred twenty-three thousand, four hundred twenty-three".