19229432909 has 2 divisors, whose sum is σ = 19229432910. Its totient is φ = 19229432908.

The previous prime is 19229432863. The next prime is 19229432933. The reversal of 19229432909 is 90923492291.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19229368900 + 64009 = 138670^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 19229432909 - 2⁸ = 19229432653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19229431909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9614716454 + 9614716455.

It is an arithmetic number, because the mean of its divisors is an integer number (9614716455).

Almost surely, 2^19229432909 is an apocalyptic number.

It is an amenable number.

19229432909 is a deficient number, since it is larger than the sum of its proper divisors (1).

19229432909 is an equidigital number, since it uses as much as digits as its factorization.

19229432909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 19229432909 in words is "nineteen billion, two hundred twenty-nine million, four hundred thirty-two thousand, nine hundred nine".