20967163 has 4 divisors (see below), whose sum is σ = 23962480. Its totient is φ = 17971848.

The previous prime is 20967161. The next prime is 20967209. The reversal of 20967163 is 36176902.

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 20967163 - 2¹ = 20967161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20967161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497648 + ... + 1497661.

It is an arithmetic number, because the mean of its divisors is an integer number (5990620).

Almost surely, 2^20967163 is an apocalyptic number.

20967163 is a deficient number, since it is larger than the sum of its proper divisors (2995317).

20967163 is an equidigital number, since it uses as much as digits as its factorization.

20967163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995316.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20967163 is about 4578.9914828486. The cubic root of 20967163 is about 275.7485413615.

The spelling of 20967163 in words is "twenty million, nine hundred sixty-seven thousand, one hundred sixty-three".