19994439174 has 12 divisors (see below), whose sum is σ = 39989571084. Its totient is φ = 6664697604.

The previous prime is 19994439167. The next prime is 19994439187. The reversal of 19994439174 is 47193449991.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 317499 + ... + 375225.

It is an arithmetic number, because the mean of its divisors is an integer number (3332464257).

Almost surely, 2^19994439174 is an apocalyptic number.

19994439174 is an abundant number, since it is smaller than the sum of its proper divisors (19995131910).

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

19994439174 is an frugal number, since it uses more digits than its factorization.

19994439174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115459 (or 57732 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 60.

The spelling of 19994439174 in words is "nineteen billion, nine hundred ninety-four million, four hundred thirty-nine thousand, one hundred seventy-four".