19857343075 has 12 divisors (see below), whose sum is σ = 24631660080. Its totient is φ = 15880355360.

The previous prime is 19857343073. The next prime is 19857343087. The reversal of 19857343075 is 57034375891.

It is not a de Polignac number, because 19857343075 - 2¹ = 19857343073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19857343073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63799 + ... + 209248.

It is an arithmetic number, because the mean of its divisors is an integer number (2052638340).

Almost surely, 2^19857343075 is an apocalyptic number.

19857343075 is a deficient number, since it is larger than the sum of its proper divisors (4774317005).

19857343075 is a wasteful number, since it uses less digits than its factorization.

19857343075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275966 (or 275961 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 19857343075 in words is "nineteen billion, eight hundred fifty-seven million, three hundred forty-three thousand, seventy-five".