20103191 has 2 divisors, whose sum is σ = 20103192. Its totient is φ = 20103190.

The previous prime is 20103157. The next prime is 20103199. The reversal of 20103191 is 19130102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20103191 - 2¹⁸ = 19841047 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 (20103199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051595 + 10051596.

It is an arithmetic number, because the mean of its divisors is an integer number (10051596).

Almost surely, 2^20103191 is an apocalyptic number.

20103191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103191 is an equidigital number, since it uses as much as digits as its factorization.

20103191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 20103191 is about 4483.6582162337. The cubic root of 20103191 is about 271.9078001736.

Adding to 20103191 its reverse (19130102), we get a palindrome (39233293).

The spelling of 20103191 in words is "twenty million, one hundred three thousand, one hundred ninety-one".