19198927513 has 2 divisors, whose sum is σ = 19198927514. Its totient is φ = 19198927512.

The previous prime is 19198927483. The next prime is 19198927567. The reversal of 19198927513 is 31572989191.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10752030864 + 8446896649 = 103692^2 + 91907^2 .

It is a cyclic number.

It is not a de Polignac number, because 19198927513 - 2⁵ = 19198927481 is a prime.

It is not a weakly prime, because it can be changed into another prime (19198924513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9599463756 + 9599463757.

It is an arithmetic number, because the mean of its divisors is an integer number (9599463757).

Almost surely, 2^19198927513 is an apocalyptic number.

It is an amenable number.

19198927513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19198927513 is an equidigital number, since it uses as much as digits as its factorization.

19198927513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 55.

The spelling of 19198927513 in words is "nineteen billion, one hundred ninety-eight million, nine hundred twenty-seven thousand, five hundred thirteen".