19193608913 has 2 divisors, whose sum is σ = 19193608914. Its totient is φ = 19193608912.

The previous prime is 19193608897. The next prime is 19193608937. The reversal of 19193608913 is 31980639191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17415553024 + 1778055889 = 131968^2 + 42167^2 .

It is a cyclic number.

It is not a de Polignac number, because 19193608913 - 2⁴ = 19193608897 is a prime.

It is not a weakly prime, because it can be changed into another prime (19193608963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9596804456 + 9596804457.

It is an arithmetic number, because the mean of its divisors is an integer number (9596804457).

Almost surely, 2^19193608913 is an apocalyptic number.

It is an amenable number.

19193608913 is a deficient number, since it is larger than the sum of its proper divisors (1).

19193608913 is an equidigital number, since it uses as much as digits as its factorization.

19193608913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 50.

The spelling of 19193608913 in words is "nineteen billion, one hundred ninety-three million, six hundred eight thousand, nine hundred thirteen".