19709473350197 has 8 divisors (see below), whose sum is σ = 19920203794872. Its totient is φ = 19499048536000.

The previous prime is 19709473350169. The next prime is 19709473350223. The reversal of 19709473350197 is 79105337490791.

It can be written as a sum of positive squares in 4 ways, for example, as 11265514939396 + 8443958410801 = 3356414^2 + 2905849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19709473350197 - 2⁸ = 19709473349941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19709473353197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76277954 + ... + 76535907.

It is an arithmetic number, because the mean of its divisors is an integer number (2490025474359).

Almost surely, 2^{19709473350197} is an apocalyptic number.

It is an amenable number.

19709473350197 is a deficient number, since it is larger than the sum of its proper divisors (210730444675).

19709473350197 is a wasteful number, since it uses less digits than its factorization.

19709473350197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152815239.

The product of its (nonzero) digits is 45008460, while the sum is 65.

The spelling of 19709473350197 in words is "nineteen trillion, seven hundred nine billion, four hundred seventy-three million, three hundred fifty thousand, one hundred ninety-seven".