19020246809 has 2 divisors, whose sum is σ = 19020246810. Its totient is φ = 19020246808.

The previous prime is 19020246769. The next prime is 19020246937. The reversal of 19020246809 is 90864202091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18953579584 + 66667225 = 137672^2 + 8165^2 .

It is a cyclic number.

It is not a de Polignac number, because 19020246809 - 2¹² = 19020242713 is a prime.

It is not a weakly prime, because it can be changed into another prime (19020246109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9510123404 + 9510123405.

It is an arithmetic number, because the mean of its divisors is an integer number (9510123405).

Almost surely, 2^19020246809 is an apocalyptic number.

It is an amenable number.

19020246809 is a deficient number, since it is larger than the sum of its proper divisors (1).

19020246809 is an equidigital number, since it uses as much as digits as its factorization.

19020246809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 19020246809 in words is "nineteen billion, twenty million, two hundred forty-six thousand, eight hundred nine".