19041625909 has 2 divisors, whose sum is σ = 19041625910. Its totient is φ = 19041625908.

The previous prime is 19041625901. The next prime is 19041626047. The reversal of 19041625909 is 90952614091.

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., 14442751684 + 4598874225 = 120178^2 + 67815^2 .

It is a cyclic number.

It is not a de Polignac number, because 19041625909 - 2³ = 19041625901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19041625901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9520812954 + 9520812955.

It is an arithmetic number, because the mean of its divisors is an integer number (9520812955).

Almost surely, 2^19041625909 is an apocalyptic number.

It is an amenable number.

19041625909 is a deficient number, since it is larger than the sum of its proper divisors (1).

19041625909 is an equidigital number, since it uses as much as digits as its factorization.

19041625909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 19041625909 in words is "nineteen billion, forty-one million, six hundred twenty-five thousand, nine hundred nine".