19239768113 has 2 divisors, whose sum is σ = 19239768114. Its totient is φ = 19239768112.

The previous prime is 19239768109. The next prime is 19239768131. The reversal of 19239768113 is 31186793291.

Together with next prime (19239768131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11556895009 + 7682873104 = 107503^2 + 87652^2 .

It is an emirp because it is prime and its reverse (31186793291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19239768113 - 2² = 19239768109 is a prime.

It is not a weakly prime, because it can be changed into another prime (19239768103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9619884056 + 9619884057.

It is an arithmetic number, because the mean of its divisors is an integer number (9619884057).

Almost surely, 2^19239768113 is an apocalyptic number.

It is an amenable number.

19239768113 is a deficient number, since it is larger than the sum of its proper divisors (1).

19239768113 is an equidigital number, since it uses as much as digits as its factorization.

19239768113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The spelling of 19239768113 in words is "nineteen billion, two hundred thirty-nine million, seven hundred sixty-eight thousand, one hundred thirteen".