19494775926 has 80 divisors (see below), whose sum is σ = 44758718928. Its totient is φ = 6338606400.

The previous prime is 19494775889. The next prime is 19494775931. The reversal of 19494775926 is 62957749491.

19494775926 is a `hidden beast` number, since 1 + 9 + 494 + 77 + 59 + 26 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7110916 + ... + 7113656.

Almost surely, 2^19494775926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19494775926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22379359464).

19494775926 is an abundant number, since it is smaller than the sum of its proper divisors (25263943002).

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

19494775926 is a wasteful number, since it uses less digits than its factorization.

19494775926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819 (or 3810 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 19494775926 in words is "nineteen billion, four hundred ninety-four million, seven hundred seventy-five thousand, nine hundred twenty-six".