19139837945857 has 8 divisors (see below), whose sum is σ = 19373723693856. Its totient is φ = 18906030419232.

The previous prime is 19139837945849. The next prime is 19139837945923. The reversal of 19139837945857 is 75854973893191.

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 19139837945857 - 2³ = 19139837945849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19139837945057) 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, 19062903 + ... + 20041804.

It is an arithmetic number, because the mean of its divisors is an integer number (2421715461732).

Almost surely, 2^{19139837945857} is an apocalyptic number.

It is an amenable number.

19139837945857 is a deficient number, since it is larger than the sum of its proper divisors (233885747999).

19139837945857 is an equidigital number, since it uses as much as digits as its factorization.

19139837945857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39110687.

The product of its digits is 2057529600, while the sum is 79.

The spelling of 19139837945857 in words is "nineteen trillion, one hundred thirty-nine billion, eight hundred thirty-seven million, nine hundred forty-five thousand, eight hundred fifty-seven".