19098015949 has 2 divisors, whose sum is σ = 19098015950. Its totient is φ = 19098015948.

The previous prime is 19098015913. The next prime is 19098015971. The reversal of 19098015949 is 94951089091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11579912100 + 7518103849 = 107610^2 + 86707^2 .

It is a cyclic number.

It is not a de Polignac number, because 19098015949 - 2⁹ = 19098015437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19098015949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19098015049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9549007974 + 9549007975.

It is an arithmetic number, because the mean of its divisors is an integer number (9549007975).

Almost surely, 2^19098015949 is an apocalyptic number.

It is an amenable number.

19098015949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19098015949 is an equidigital number, since it uses as much as digits as its factorization.

19098015949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 55.

The spelling of 19098015949 in words is "nineteen billion, ninety-eight million, fifteen thousand, nine hundred forty-nine".