20003163 has 4 divisors (see below), whose sum is σ = 26670888. Its totient is φ = 13335440.

The previous prime is 20003161. The next prime is 20003167. The reversal of 20003163 is 36130002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20003163 - 2¹ = 20003161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20003161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333858 + ... + 3333863.

It is an arithmetic number, because the mean of its divisors is an integer number (6667722).

Almost surely, 2^20003163 is an apocalyptic number.

20003163 is a deficient number, since it is larger than the sum of its proper divisors (6667725).

20003163 is an equidigital number, since it uses as much as digits as its factorization.

20003163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667724.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20003163 is about 4472.4895751695. The cubic root of 20003163 is about 271.4560704101.

Adding to 20003163 its reverse (36130002), we get a palindrome (56133165).

The spelling of 20003163 in words is "twenty million, three thousand, one hundred sixty-three".