19294171513 has 2 divisors, whose sum is σ = 19294171514. Its totient is φ = 19294171512.

The previous prime is 19294171439. The next prime is 19294171517. The reversal of 19294171513 is 31517149291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19256557824 + 37613689 = 138768^2 + 6133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19294171513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19294171513.

It is not a weakly prime, because it can be changed into another prime (19294171517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9647085756 + 9647085757.

It is an arithmetic number, because the mean of its divisors is an integer number (9647085757).

Almost surely, 2^19294171513 is an apocalyptic number.

It is an amenable number.

19294171513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19294171513 is an equidigital number, since it uses as much as digits as its factorization.

19294171513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The spelling of 19294171513 in words is "nineteen billion, two hundred ninety-four million, one hundred seventy-one thousand, five hundred thirteen".