10820191 has 2 divisors, whose sum is σ = 10820192. Its totient is φ = 10820190.

The previous prime is 10820179. The next prime is 10820203. The reversal of 10820191 is 19102801.

It is a balanced prime because it is at equal distance from previous prime (10820179) and next prime (10820203).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10820191 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 (10820111) 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 as a sum of consecutive naturals, namely, 5410095 + 5410096.

It is an arithmetic number, because the mean of its divisors is an integer number (5410096).

Almost surely, 2^10820191 is an apocalyptic number.

10820191 is a deficient number, since it is larger than the sum of its proper divisors (1).

10820191 is an equidigital number, since it uses as much as digits as its factorization.

10820191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 10820191 is about 3289.4058734063. The cubic root of 10820191 is about 221.1795528320.

Adding to 10820191 its reverse (19102801), we get a palindrome (29922992).

It can be divided in two parts, 10820 and 191, that added together give a palindrome (11011).

The spelling of 10820191 in words is "ten million, eight hundred twenty thousand, one hundred ninety-one".