19713634432 has 64 divisors (see below), whose sum is σ = 40294275840. Its totient is φ = 9601320960.

The previous prime is 19713634387. The next prime is 19713634453. The reversal of 19713634432 is 23443631791.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 3812713 + ... + 3817879.

It is an arithmetic number, because the mean of its divisors is an integer number (629598060).

Almost surely, 2^19713634432 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 19713634432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20147137920).

19713634432 is an abundant number, since it is smaller than the sum of its proper divisors (20580641408).

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

19713634432 is an equidigital number, since it uses as much as digits as its factorization.

19713634432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949 (or 5937 counting only the distinct ones).

The product of its digits is 326592, while the sum is 43.

The spelling of 19713634432 in words is "nineteen billion, seven hundred thirteen million, six hundred thirty-four thousand, four hundred thirty-two".