19229138009 has 2 divisors, whose sum is σ = 19229138010. Its totient is φ = 19229138008.

The previous prime is 19229137999. The next prime is 19229138023. The reversal of 19229138009 is 90083192291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18592686025 + 636451984 = 136355^2 + 25228^2 .

It is a cyclic number.

It is not a de Polignac number, because 19229138009 - 2²⁴ = 19212360793 is a prime.

It is not a weakly prime, because it can be changed into another prime (19229138029) 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, 9614569004 + 9614569005.

It is an arithmetic number, because the mean of its divisors is an integer number (9614569005).

Almost surely, 2^19229138009 is an apocalyptic number.

It is an amenable number.

19229138009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19229138009 is an equidigital number, since it uses as much as digits as its factorization.

19229138009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 19229138009 in words is "nineteen billion, two hundred twenty-nine million, one hundred thirty-eight thousand, nine".