20327161 has 2 divisors, whose sum is σ = 20327162. Its totient is φ = 20327160.

The previous prime is 20327149. The next prime is 20327179. The reversal of 20327161 is 16172302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1142761 = 4380^2 + 1069^2 .

It is a cyclic number.

It is not a de Polignac number, because 20327161 - 2⁵ = 20327129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20327191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163580 + 10163581.

It is an arithmetic number, because the mean of its divisors is an integer number (10163581).

Almost surely, 2^20327161 is an apocalyptic number.

It is an amenable number.

20327161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20327161 is an equidigital number, since it uses as much as digits as its factorization.

20327161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20327161 is about 4508.5652928620. The cubic root of 20327161 is about 272.9138497414.

Adding to 20327161 its reverse (16172302), we get a palindrome (36499463).

The spelling of 20327161 in words is "twenty million, three hundred twenty-seven thousand, one hundred sixty-one".