20226191 has 2 divisors, whose sum is σ = 20226192. Its totient is φ = 20226190.

The previous prime is 20226179. The next prime is 20226221. The reversal of 20226191 is 19162202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20226191 - 2¹⁰ = 20225167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20226091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10113095 + 10113096.

It is an arithmetic number, because the mean of its divisors is an integer number (10113096).

Almost surely, 2^20226191 is an apocalyptic number.

20226191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20226191 is an equidigital number, since it uses as much as digits as its factorization.

20226191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20226191 is about 4497.3537775007. The cubic root of 20226191 is about 272.4612227739.

Adding to 20226191 its reverse (19162202), we get a palindrome (39388393).

The spelling of 20226191 in words is "twenty million, two hundred twenty-six thousand, one hundred ninety-one".