17705950189 has 2 divisors, whose sum is σ = 17705950190. Its totient is φ = 17705950188.

The previous prime is 17705950153. The next prime is 17705950201. The reversal of 17705950189 is 98105950771.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13171005225 + 4534944964 = 114765^2 + 67342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17705950189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17705950139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8852975094 + 8852975095.

It is an arithmetic number, because the mean of its divisors is an integer number (8852975095).

Almost surely, 2^17705950189 is an apocalyptic number.

It is an amenable number.

17705950189 is a deficient number, since it is larger than the sum of its proper divisors (1).

17705950189 is an equidigital number, since it uses as much as digits as its factorization.

17705950189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 52.

The spelling of 17705950189 in words is "seventeen billion, seven hundred five million, nine hundred fifty thousand, one hundred eighty-nine".