17904195109 has 2 divisors, whose sum is σ = 17904195110. Its totient is φ = 17904195108.

The previous prime is 17904195017. The next prime is 17904195119. The reversal of 17904195109 is 90159140971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17840944900 + 63250209 = 133570^2 + 7953^2 .

It is a cyclic number.

It is not a de Polignac number, because 17904195109 - 2⁹ = 17904194597 is a prime.

It is a super-2 number, since 2×17904195109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17904195119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8952097554 + 8952097555.

It is an arithmetic number, because the mean of its divisors is an integer number (8952097555).

Almost surely, 2^17904195109 is an apocalyptic number.

It is an amenable number.

17904195109 is a deficient number, since it is larger than the sum of its proper divisors (1).

17904195109 is an equidigital number, since it uses as much as digits as its factorization.

17904195109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 46.

The spelling of 17904195109 in words is "seventeen billion, nine hundred four million, one hundred ninety-five thousand, one hundred nine".