19018675849 has 2 divisors, whose sum is σ = 19018675850. Its totient is φ = 19018675848.

The previous prime is 19018675847. The next prime is 19018675853. The reversal of 19018675849 is 94857681091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10113922624 + 8904753225 = 100568^2 + 94365^2 .

It is a cyclic number.

It is not a de Polignac number, because 19018675849 - 2¹ = 19018675847 is a prime.

Together with 19018675847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 19018675793 and 19018675802.

It is not a weakly prime, because it can be changed into another prime (19018675847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9509337924 + 9509337925.

It is an arithmetic number, because the mean of its divisors is an integer number (9509337925).

Almost surely, 2^19018675849 is an apocalyptic number.

It is an amenable number.

19018675849 is a deficient number, since it is larger than the sum of its proper divisors (1).

19018675849 is an equidigital number, since it uses as much as digits as its factorization.

19018675849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 19018675849 in words is "nineteen billion, eighteen million, six hundred seventy-five thousand, eight hundred forty-nine".