19768849 has 2 divisors, whose sum is σ = 19768850. Its totient is φ = 19768848.

The previous prime is 19768843. The next prime is 19768867. The reversal of 19768849 is 94886791.

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., 16769025 + 2999824 = 4095^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 19768849 - 2¹⁵ = 19736081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19768796 and 19768805.

It is not a weakly prime, because it can be changed into another prime (19768843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9884424 + 9884425.

It is an arithmetic number, because the mean of its divisors is an integer number (9884425).

Almost surely, 2^19768849 is an apocalyptic number.

It is an amenable number.

19768849 is a deficient number, since it is larger than the sum of its proper divisors (1).

19768849 is an equidigital number, since it uses as much as digits as its factorization.

19768849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 19768849 is about 4446.2173811005. The cubic root of 19768849 is about 270.3919729726.

The spelling of 19768849 in words is "nineteen million, seven hundred sixty-eight thousand, eight hundred forty-nine".