19965471232 has 40 divisors (see below), whose sum is σ = 45590805216. Its totient is φ = 8556628992.

The previous prime is 19965471181. The next prime is 19965471271. The reversal of 19965471232 is 23217456991.

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 3 ways as a sum of consecutive naturals, for example, 2781778 + ... + 2788945.

Almost surely, 2^19965471232 is an apocalyptic number.

It is an amenable number.

19965471232 is an abundant number, since it is smaller than the sum of its proper divisors (25625333984).

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

19965471232 is an frugal number, since it uses more digits than its factorization.

19965471232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570748 (or 5570732 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The spelling of 19965471232 in words is "nineteen billion, nine hundred sixty-five million, four hundred seventy-one thousand, two hundred thirty-two".