20320303 has 2 divisors, whose sum is σ = 20320304. Its totient is φ = 20320302.

The previous prime is 20320277. The next prime is 20320343. The reversal of 20320303 is 30302302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20320303 - 2¹³ = 20312111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160151 + 10160152.

It is an arithmetic number, because the mean of its divisors is an integer number (10160152).

Almost surely, 2^20320303 is an apocalyptic number.

20320303 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320303 is an equidigital number, since it uses as much as digits as its factorization.

20320303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 20320303 is about 4507.8046763364. The cubic root of 20320303 is about 272.8831542972.

Adding to 20320303 its reverse (30302302), we get a palindrome (50622605).

The spelling of 20320303 in words is "twenty million, three hundred twenty thousand, three hundred three".