19719730103 has 2 divisors, whose sum is σ = 19719730104. Its totient is φ = 19719730102.

The previous prime is 19719730099. The next prime is 19719730111. The reversal of 19719730103 is 30103791791.

It is a weak prime.

It is an emirp because it is prime and its reverse (30103791791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19719730103 - 2² = 19719730099 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19719730183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9859865051 + 9859865052.

It is an arithmetic number, because the mean of its divisors is an integer number (9859865052).

Almost surely, 2^19719730103 is an apocalyptic number.

19719730103 is a deficient number, since it is larger than the sum of its proper divisors (1).

19719730103 is an equidigital number, since it uses as much as digits as its factorization.

19719730103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 41.

The spelling of 19719730103 in words is "nineteen billion, seven hundred nineteen million, seven hundred thirty thousand, one hundred three".