19839679344 has 30 divisors (see below), whose sum is σ = 55523547456. Its totient is φ = 6613226400.

The previous prime is 19839679289. The next prime is 19839679373. The reversal of 19839679344 is 44397693891.

19839679344 is a `hidden beast` number, since 198 + 39 + 6 + 79 + 344 = 666.

It is a super-2 number, since 2×19839679344² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68887632 + ... + 68887919.

Almost surely, 2^19839679344 is an apocalyptic number.

It is an amenable number.

19839679344 is an abundant number, since it is smaller than the sum of its proper divisors (35683868112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19839679344 is a wasteful number, since it uses less digits than its factorization.

19839679344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137775565 (or 137775556 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 19839679344 in words is "nineteen billion, eight hundred thirty-nine million, six hundred seventy-nine thousand, three hundred forty-four".