19648254089 has 2 divisors, whose sum is σ = 19648254090. Its totient is φ = 19648254088.

The previous prime is 19648254053. The next prime is 19648254113. The reversal of 19648254089 is 98045284691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17340412489 + 2307841600 = 131683^2 + 48040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19648254089 is a prime.

It is not a weakly prime, because it can be changed into another prime (19648254019) 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, 9824127044 + 9824127045.

It is an arithmetic number, because the mean of its divisors is an integer number (9824127045).

Almost surely, 2^19648254089 is an apocalyptic number.

It is an amenable number.

19648254089 is a deficient number, since it is larger than the sum of its proper divisors (1).

19648254089 is an equidigital number, since it uses as much as digits as its factorization.

19648254089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 19648254089 in words is "nineteen billion, six hundred forty-eight million, two hundred fifty-four thousand, eighty-nine".