19688432064 has 84 divisors (see below), whose sum is σ = 60597205704. Its totient is φ = 5625263616.

The previous prime is 19688432051. The next prime is 19688432081. The reversal of 19688432064 is 46023488691.

It is a tau number, because it is divible by the number of its divisors (84).

It is a junction number, because it is equal to n+sod(n) for n = 19688431998 and 19688432016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1036959 + ... + 1055774.

It is an arithmetic number, because the mean of its divisors is an integer number (721395306).

Almost surely, 2^19688432064 is an apocalyptic number.

19688432064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19688432064 is an abundant number, since it is smaller than the sum of its proper divisors (40908773640).

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

19688432064 is a wasteful number, since it uses less digits than its factorization.

19688432064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092762 (or 2092745 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 19688432064 in words is "nineteen billion, six hundred eighty-eight million, four hundred thirty-two thousand, sixty-four".