19675165109 has 2 divisors, whose sum is σ = 19675165110. Its totient is φ = 19675165108.

The previous prime is 19675165099. The next prime is 19675165187. The reversal of 19675165109 is 90156157691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13607222500 + 6067942609 = 116650^2 + 77897^2 .

It is a cyclic number.

It is not a de Polignac number, because 19675165109 - 2⁴ = 19675165093 is a prime.

It is a super-2 number, since 2×19675165109² (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 (19675165309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9837582554 + 9837582555.

It is an arithmetic number, because the mean of its divisors is an integer number (9837582555).

Almost surely, 2^19675165109 is an apocalyptic number.

It is an amenable number.

19675165109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19675165109 is an equidigital number, since it uses as much as digits as its factorization.

19675165109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 510300, while the sum is 50.

The spelling of 19675165109 in words is "nineteen billion, six hundred seventy-five million, one hundred sixty-five thousand, one hundred nine".