17919050139 has 12 divisors (see below), whose sum is σ = 25891634496. Its totient is φ = 11942081712.

The previous prime is 17919050131. The next prime is 17919050153. The reversal of 17919050139 is 93105091971.

It is a happy number.

It is not a de Polignac number, because 17919050139 - 2³ = 17919050131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17919050094 and 17919050103.

It is not an unprimeable number, because it can be changed into a prime (17919050131) 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, 300459 + ... + 355124.

It is an arithmetic number, because the mean of its divisors is an integer number (2157636208).

Almost surely, 2^17919050139 is an apocalyptic number.

17919050139 is a deficient number, since it is larger than the sum of its proper divisors (7972584357).

17919050139 is a wasteful number, since it uses less digits than its factorization.

17919050139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658626 (or 658623 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 45.

The spelling of 17919050139 in words is "seventeen billion, nine hundred nineteen million, fifty thousand, one hundred thirty-nine".