19406804928 has 56 divisors (see below), whose sum is σ = 58682485632. Its totient is φ = 5544801024.

The previous prime is 19406804909. The next prime is 19406804957. The reversal of 19406804928 is 82940860491.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

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, 7218450 + ... + 7221137.

Almost surely, 2^19406804928 is an apocalyptic number.

It is an amenable number.

19406804928 is an abundant number, since it is smaller than the sum of its proper divisors (39275680704).

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

19406804928 is a wasteful number, since it uses less digits than its factorization.

19406804928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14439609 (or 14439599 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 19406804928 in words is "nineteen billion, four hundred six million, eight hundred four thousand, nine hundred twenty-eight".