19214006516209 has 2 divisors, whose sum is σ = 19214006516210. Its totient is φ = 19214006516208.

The previous prime is 19214006516189. The next prime is 19214006516233. The reversal of 19214006516209 is 90261560041291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14697807747984 + 4516198768225 = 3833772^2 + 2125135^2 .

It is a cyclic number.

It is not a de Polignac number, because 19214006516209 - 2²³ = 19213998127601 is a prime.

It is not a weakly prime, because it can be changed into another prime (19214006511209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9607003258104 + 9607003258105.

It is an arithmetic number, because the mean of its divisors is an integer number (9607003258105).

Almost surely, 2^{19214006516209} is an apocalyptic number.

It is an amenable number.

19214006516209 is a deficient number, since it is larger than the sum of its proper divisors (1).

19214006516209 is an equidigital number, since it uses as much as digits as its factorization.

19214006516209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 19214006516209 in words is "nineteen trillion, two hundred fourteen billion, six million, five hundred sixteen thousand, two hundred nine".