19520849 has 2 divisors, whose sum is σ = 19520850. Its totient is φ = 19520848.

The previous prime is 19520843. The next prime is 19520861. The reversal of 19520849 is 94802591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 4060225 = 3932^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 19520849 - 2⁴ = 19520833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19520843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9760424 + 9760425.

It is an arithmetic number, because the mean of its divisors is an integer number (9760425).

Almost surely, 2^19520849 is an apocalyptic number.

It is an amenable number.

19520849 is a deficient number, since it is larger than the sum of its proper divisors (1).

19520849 is an equidigital number, since it uses as much as digits as its factorization.

19520849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 19520849 is about 4418.2404868907. The cubic root of 19520849 is about 269.2565234453.

The spelling of 19520849 in words is "nineteen million, five hundred twenty thousand, eight hundred forty-nine".