20197163 has 6 divisors (see below), whose sum is σ = 23494716. Its totient is φ = 17311812.

The previous prime is 20197159. The next prime is 20197183. The reversal of 20197163 is 36179102.

It is not a de Polignac number, because 20197163 - 2² = 20197159 is a prime.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20197103) 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 5 ways as a sum of consecutive naturals, for example, 206045 + ... + 206142.

It is an arithmetic number, because the mean of its divisors is an integer number (3915786).

Almost surely, 2^20197163 is an apocalyptic number.

20197163 is a deficient number, since it is larger than the sum of its proper divisors (3297553).

20197163 is an equidigital number, since it uses as much as digits as its factorization.

20197163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412201 (or 412194 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 20197163 is about 4494.1253876589. The cubic root of 20197163 is about 272.3308177464.

The spelling of 20197163 in words is "twenty million, one hundred ninety-seven thousand, one hundred sixty-three".