19166206207 has 2 divisors, whose sum is σ = 19166206208. Its totient is φ = 19166206206.

The previous prime is 19166206183. The next prime is 19166206211. The reversal of 19166206207 is 70260266191.

It is a strong prime.

It is an emirp because it is prime and its reverse (70260266191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19166206207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19166206207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19166206247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9583103103 + 9583103104.

It is an arithmetic number, because the mean of its divisors is an integer number (9583103104).

Almost surely, 2^19166206207 is an apocalyptic number.

19166206207 is a deficient number, since it is larger than the sum of its proper divisors (1).

19166206207 is an equidigital number, since it uses as much as digits as its factorization.

19166206207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 19166206207 in words is "nineteen billion, one hundred sixty-six million, two hundred six thousand, two hundred seven".