19129835426 has 16 divisors (see below), whose sum is σ = 30904924344. Its totient is φ = 8828331264.

The previous prime is 19129835381. The next prime is 19129835447. The reversal of 19129835426 is 62453892191.

It can be written as a sum of positive squares in 4 ways, for example, as 3517083025 + 15612752401 = 59305^2 + 124951^2 .

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 7 ways as a sum of consecutive naturals, for example, 318056 + ... + 373388.

Almost surely, 2^19129835426 is an apocalyptic number.

19129835426 is a deficient number, since it is larger than the sum of its proper divisors (11775088918).

19129835426 is a wasteful number, since it uses less digits than its factorization.

19129835426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68645.

The product of its digits is 933120, while the sum is 50.

The spelling of 19129835426 in words is "nineteen billion, one hundred twenty-nine million, eight hundred thirty-five thousand, four hundred twenty-six".