19470494117 has 2 divisors, whose sum is σ = 19470494118. Its totient is φ = 19470494116.

The previous prime is 19470494107. The next prime is 19470494119. The reversal of 19470494117 is 71149407491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19467504676 + 2989441 = 139526^2 + 1729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19470494117 is a prime.

Together with 19470494119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19470494119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9735247058 + 9735247059.

It is an arithmetic number, because the mean of its divisors is an integer number (9735247059).

Almost surely, 2^19470494117 is an apocalyptic number.

It is an amenable number.

19470494117 is a deficient number, since it is larger than the sum of its proper divisors (1).

19470494117 is an equidigital number, since it uses as much as digits as its factorization.

19470494117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 19470494117 in words is "nineteen billion, four hundred seventy million, four hundred ninety-four thousand, one hundred seventeen".