19604469217 has 2 divisors, whose sum is σ = 19604469218. Its totient is φ = 19604469216.

The previous prime is 19604469197. The next prime is 19604469251. The reversal of 19604469217 is 71296440691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10715562256 + 8888906961 = 103516^2 + 94281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19604469217 is a prime.

It is not a weakly prime, because it can be changed into another prime (19604469257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9802234608 + 9802234609.

It is an arithmetic number, because the mean of its divisors is an integer number (9802234609).

Almost surely, 2^19604469217 is an apocalyptic number.

It is an amenable number.

19604469217 is a deficient number, since it is larger than the sum of its proper divisors (1).

19604469217 is an equidigital number, since it uses as much as digits as its factorization.

19604469217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 19604469217 in words is "nineteen billion, six hundred four million, four hundred sixty-nine thousand, two hundred seventeen".