20303163 has 8 divisors (see below), whose sum is σ = 30078800. Its totient is φ = 13535424.

The previous prime is 20303149. The next prime is 20303197. The reversal of 20303163 is 36130302.

It is a happy number.

It is not a de Polignac number, because 20303163 - 2⁴ = 20303147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20303123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375958 + ... + 376011.

It is an arithmetic number, because the mean of its divisors is an integer number (3759850).

Almost surely, 2^20303163 is an apocalyptic number.

20303163 is a deficient number, since it is larger than the sum of its proper divisors (9775637).

20303163 is an equidigital number, since it uses as much as digits as its factorization.

20303163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751978 (or 751972 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 20303163 is about 4505.9031281198. The cubic root of 20303163 is about 272.8064078539.

Adding to 20303163 its reverse (36130302), we get a palindrome (56433465).

The spelling of 20303163 in words is "twenty million, three hundred three thousand, one hundred sixty-three".