19327971684 has 96 divisors (see below), whose sum is σ = 52045557760. Its totient is φ = 5468456448.

The previous prime is 19327971671. The next prime is 19327971703. The reversal of 19327971684 is 48617972391.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5053797 + ... + 5057619.

Almost surely, 2^19327971684 is an apocalyptic number.

19327971684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19327971684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26022778880).

19327971684 is an abundant number, since it is smaller than the sum of its proper divisors (32717586076).

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

19327971684 is a wasteful number, since it uses less digits than its factorization.

19327971684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409 (or 4407 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The spelling of 19327971684 in words is "nineteen billion, three hundred twenty-seven million, nine hundred seventy-one thousand, six hundred eighty-four".