19866272532 has 24 divisors (see below), whose sum is σ = 46375291872. Its totient is φ = 6619140000.

The previous prime is 19866272519. The next prime is 19866272551. The reversal of 19866272532 is 23527266891.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 340719 + ... + 394742.

It is an arithmetic number, because the mean of its divisors is an integer number (1932303828).

Almost surely, 2^19866272532 is an apocalyptic number.

19866272532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19866272532 is an abundant number, since it is smaller than the sum of its proper divisors (26509019340).

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

19866272532 is a wasteful number, since it uses less digits than its factorization.

19866272532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737719 (or 737717 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The spelling of 19866272532 in words is "nineteen billion, eight hundred sixty-six million, two hundred seventy-two thousand, five hundred thirty-two".