19353672109 has 2 divisors, whose sum is σ = 19353672110. Its totient is φ = 19353672108.

The previous prime is 19353672077. The next prime is 19353672131. The reversal of 19353672109 is 90127635391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16180603209 + 3173068900 = 127203^2 + 56330^2 .

It is a cyclic number.

It is not a de Polignac number, because 19353672109 - 2⁵ = 19353672077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19353672809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9676836054 + 9676836055.

It is an arithmetic number, because the mean of its divisors is an integer number (9676836055).

Almost surely, 2^19353672109 is an apocalyptic number.

It is an amenable number.

19353672109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19353672109 is an equidigital number, since it uses as much as digits as its factorization.

19353672109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The spelling of 19353672109 in words is "nineteen billion, three hundred fifty-three million, six hundred seventy-two thousand, one hundred nine".