19447247232 has 448 divisors, whose sum is σ = 69924019200. Its totient is φ = 5260557312.

The previous prime is 19447247179. The next prime is 19447247243. The reversal of 19447247232 is 23274274491.

It is a tau number, because it is divible by the number of its divisors (448).

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

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 55 ways as a sum of consecutive naturals, for example, 12409713 + ... + 12411279.

It is an arithmetic number, because the mean of its divisors is an integer number (156080400).

Almost surely, 2^19447247232 is an apocalyptic number.

19447247232 is a gapful number since it is divisible by the number (12) 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 19447247232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34962009600).

19447247232 is an abundant number, since it is smaller than the sum of its proper divisors (50476771968).

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

19447247232 is an equidigital number, since it uses as much as digits as its factorization.

19447247232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625 (or 1598 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The spelling of 19447247232 in words is "nineteen billion, four hundred forty-seven million, two hundred forty-seven thousand, two hundred thirty-two".