19875273917 has 8 divisors (see below), whose sum is σ = 20566579800. Its totient is φ = 19184364864.

The previous prime is 19875273871. The next prime is 19875273949. The reversal of 19875273917 is 71937257891.

It can be written as a sum of positive squares in 4 ways, for example, as 13412882596 + 6462391321 = 115814^2 + 80389^2 .

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 19875273917 - 2¹⁸ = 19875011773 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 (19875273997) 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, 4559 + ... + 199427.

It is an arithmetic number, because the mean of its divisors is an integer number (2570822475).

Almost surely, 2^19875273917 is an apocalyptic number.

It is an amenable number.

19875273917 is a deficient number, since it is larger than the sum of its proper divisors (691305883).

19875273917 is a wasteful number, since it uses less digits than its factorization.

19875273917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198415.

The product of its digits is 6667920, while the sum is 59.

The spelling of 19875273917 in words is "nineteen billion, eight hundred seventy-five million, two hundred seventy-three thousand, nine hundred seventeen".