17871021371379 has 12 divisors (see below), whose sum is σ = 26191138759688. Its totient is φ = 10830922043040.

The previous prime is 17871021371351. The next prime is 17871021371419. The reversal of 17871021371379 is 97317312017871.

It is a happy number.

It is not a de Polignac number, because 17871021371379 - 2²⁸ = 17870752935923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17871021371309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24615731554 + ... + 24615732279.

Almost surely, 2^{17871021371379} is an apocalyptic number.

17871021371379 is a deficient number, since it is larger than the sum of its proper divisors (8320117388309).

17871021371379 is a wasteful number, since it uses less digits than its factorization.

17871021371379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49231463858 (or 49231463847 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 57.

The spelling of 17871021371379 in words is "seventeen trillion, eight hundred seventy-one billion, twenty-one million, three hundred seventy-one thousand, three hundred seventy-nine".