19909103 has 2 divisors, whose sum is σ = 19909104. Its totient is φ = 19909102.

The previous prime is 19909081. The next prime is 19909111. The reversal of 19909103 is 30190991.

It is a strong prime.

It is an emirp because it is prime and its reverse (30190991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19909103 - 2¹⁸ = 19646959 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19909103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19909163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9954551 + 9954552.

It is an arithmetic number, because the mean of its divisors is an integer number (9954552).

Almost surely, 2^19909103 is an apocalyptic number.

19909103 is a deficient number, since it is larger than the sum of its proper divisors (1).

19909103 is an equidigital number, since it uses as much as digits as its factorization.

19909103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 19909103 is about 4461.9617882721. The cubic root of 19909103 is about 271.0299164061.

The spelling of 19909103 in words is "nineteen million, nine hundred nine thousand, one hundred three".