19439138304 has 60 divisors (see below), whose sum is σ = 56102682636. Its totient is φ = 6479711232.

The previous prime is 19439138293. The next prime is 19439138333. The reversal of 19439138304 is 40383193491.

It is a self number, because there is not a number n which added to its sum of digits gives 19439138304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2104674 + ... + 2113889.

Almost surely, 2^19439138304 is an apocalyptic number.

It is an amenable number.

19439138304 is an abundant number, since it is smaller than the sum of its proper divisors (36663544332).

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

19439138304 is an equidigital number, since it uses as much as digits as its factorization.

19439138304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218587 (or 4218568 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 19439138304 in words is "nineteen billion, four hundred thirty-nine million, one hundred thirty-eight thousand, three hundred four".