19450191107 has 2 divisors, whose sum is σ = 19450191108. Its totient is φ = 19450191106.

The previous prime is 19450191083. The next prime is 19450191169. The reversal of 19450191107 is 70119105491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19450191107 - 2¹² = 19450187011 is a prime.

It is not a weakly prime, because it can be changed into another prime (19450191907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9725095553 + 9725095554.

It is an arithmetic number, because the mean of its divisors is an integer number (9725095554).

Almost surely, 2^19450191107 is an apocalyptic number.

19450191107 is a deficient number, since it is larger than the sum of its proper divisors (1).

19450191107 is an equidigital number, since it uses as much as digits as its factorization.

19450191107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 38.

Adding to 19450191107 its reverse (70119105491), we get a palindrome (89569296598).

The spelling of 19450191107 in words is "nineteen billion, four hundred fifty million, one hundred ninety-one thousand, one hundred seven".