19539426434 has 16 divisors (see below), whose sum is σ = 32272429536. Its totient is φ = 8798551200.

The previous prime is 19539426331. The next prime is 19539426469. The reversal of 19539426434 is 43462493591.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4147907 + ... + 4152614.

It is an arithmetic number, because the mean of its divisors is an integer number (2017026846).

Almost surely, 2^19539426434 is an apocalyptic number.

19539426434 is a deficient number, since it is larger than the sum of its proper divisors (12733003102).

19539426434 is a wasteful number, since it uses less digits than its factorization.

19539426434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8300641.

The product of its digits is 2799360, while the sum is 50.

The spelling of 19539426434 in words is "nineteen billion, five hundred thirty-nine million, four hundred twenty-six thousand, four hundred thirty-four".