20323999 has 2 divisors, whose sum is σ = 20324000. Its totient is φ = 20323998.

The previous prime is 20323969. The next prime is 20324009. The reversal of 20323999 is 99932302.

20323999 is nontrivially palindromic in base 7.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20323999 - 2⁷ = 20323871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20323909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161999 + 10162000.

It is an arithmetic number, because the mean of its divisors is an integer number (10162000).

Almost surely, 2^20323999 is an apocalyptic number.

20323999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323999 is an equidigital number, since it uses as much as digits as its factorization.

20323999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 20323999 is about 4508.2146133475. The cubic root of 20323999 is about 272.8996979317.

The spelling of 20323999 in words is "twenty million, three hundred twenty-three thousand, nine hundred ninety-nine".