19246048849 has 2 divisors, whose sum is σ = 19246048850. Its totient is φ = 19246048848.

The previous prime is 19246048799. The next prime is 19246048873. The reversal of 19246048849 is 94884064291.

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., 19048140225 + 197908624 = 138015^2 + 14068^2 .

It is a cyclic number.

It is not a de Polignac number, because 19246048849 - 2⁹ = 19246048337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19246048849.

It is not a weakly prime, because it can be changed into another prime (19246048889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9623024424 + 9623024425.

It is an arithmetic number, because the mean of its divisors is an integer number (9623024425).

Almost surely, 2^19246048849 is an apocalyptic number.

It is an amenable number.

19246048849 is a deficient number, since it is larger than the sum of its proper divisors (1).

19246048849 is an equidigital number, since it uses as much as digits as its factorization.

19246048849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 19246048849 in words is "nineteen billion, two hundred forty-six million, forty-eight thousand, eight hundred forty-nine".