19508428794 has 16 divisors (see below), whose sum is σ = 39025732032. Its totient is φ = 6501330528.

The previous prime is 19508428777. The next prime is 19508428871. The reversal of 19508428794 is 49782480591.

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, 341019 + ... + 394094.

It is an arithmetic number, because the mean of its divisors is an integer number (2439108252).

Almost surely, 2^19508428794 is an apocalyptic number.

19508428794 is an abundant number, since it is smaller than the sum of its proper divisors (19517303238).

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

19508428794 is a wasteful number, since it uses less digits than its factorization.

19508428794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739541.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 19508428794 in words is "nineteen billion, five hundred eight million, four hundred twenty-eight thousand, seven hundred ninety-four".