19099956497 has 2 divisors, whose sum is σ = 19099956498. Its totient is φ = 19099956496.

The previous prime is 19099956457. The next prime is 19099956503. The reversal of 19099956497 is 79465999091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19092606976 + 7349521 = 138176^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 19099956497 - 2¹⁸ = 19099694353 is a prime.

It is a super-2 number, since 2×19099956497² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19099956457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9549978248 + 9549978249.

It is an arithmetic number, because the mean of its divisors is an integer number (9549978249).

Almost surely, 2^19099956497 is an apocalyptic number.

It is an amenable number.

19099956497 is a deficient number, since it is larger than the sum of its proper divisors (1).

19099956497 is an equidigital number, since it uses as much as digits as its factorization.

19099956497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49601160, while the sum is 68.

The spelling of 19099956497 in words is "nineteen billion, ninety-nine million, nine hundred fifty-six thousand, four hundred ninety-seven".