19804419936 has 144 divisors (see below), whose sum is σ = 66440844288. Its totient is φ = 5475859200.

The previous prime is 19804419923. The next prime is 19804419983. The reversal of 19804419936 is 63991440891.

It is a happy number.

19804419936 is a `hidden beast` number, since 1 + 9 + 80 + 441 + 99 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95950 + ... + 220941.

It is an arithmetic number, because the mean of its divisors is an integer number (461394752).

Almost surely, 2^19804419936 is an apocalyptic number.

19804419936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19804419936 is an abundant number, since it is smaller than the sum of its proper divisors (46636424352).

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

19804419936 is a wasteful number, since it uses less digits than its factorization.

19804419936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316945 (or 316934 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 19804419936 in words is "nineteen billion, eight hundred four million, four hundred nineteen thousand, nine hundred thirty-six".