19631689344 has 96 divisors (see below), whose sum is σ = 56923907040. Its totient is φ = 6493893120.

The previous prime is 19631689339. The next prime is 19631689361. The reversal of 19631689344 is 44398613691.

19631689344 is a `hidden beast` number, since 196 + 31 + 6 + 89 + 344 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

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, 85869 + ... + 215955.

It is an arithmetic number, because the mean of its divisors is an integer number (592957365).

Almost surely, 2^19631689344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19631689344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28461953520).

19631689344 is an abundant number, since it is smaller than the sum of its proper divisors (37292217696).

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

19631689344 is a wasteful number, since it uses less digits than its factorization.

19631689344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130238 (or 130223 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The spelling of 19631689344 in words is "nineteen billion, six hundred thirty-one million, six hundred eighty-nine thousand, three hundred forty-four".