19299115909 has 2 divisors, whose sum is σ = 19299115910. Its totient is φ = 19299115908.

The previous prime is 19299115877. The next prime is 19299115933. The reversal of 19299115909 is 90951199291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18417204100 + 881911809 = 135710^2 + 29697^2 .

It is a cyclic number.

It is not a de Polignac number, because 19299115909 - 2⁵ = 19299115877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19299115909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19299113909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9649557954 + 9649557955.

It is an arithmetic number, because the mean of its divisors is an integer number (9649557955).

Almost surely, 2^19299115909 is an apocalyptic number.

It is an amenable number.

19299115909 is a deficient number, since it is larger than the sum of its proper divisors (1).

19299115909 is an equidigital number, since it uses as much as digits as its factorization.

19299115909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 590490, while the sum is 55.

The spelling of 19299115909 in words is "nineteen billion, two hundred ninety-nine million, one hundred fifteen thousand, nine hundred nine".