20336191 has 2 divisors, whose sum is σ = 20336192. Its totient is φ = 20336190.

The previous prime is 20336189. The next prime is 20336207. The reversal of 20336191 is 19163302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20336191 - 2¹ = 20336189 is a prime.

Together with 20336189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20336171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168095 + 10168096.

It is an arithmetic number, because the mean of its divisors is an integer number (10168096).

Almost surely, 2^20336191 is an apocalyptic number.

20336191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20336191 is an equidigital number, since it uses as much as digits as its factorization.

20336191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 20336191 is about 4509.5666088883. The cubic root of 20336191 is about 272.9542562239.

Adding to 20336191 its reverse (19163302), we get a palindrome (39499493).

Subtracting from 20336191 its reverse (19163302), we obtain a square (1172889 = 1083²).

The spelling of 20336191 in words is "twenty million, three hundred thirty-six thousand, one hundred ninety-one".