19556023332 has 72 divisors (see below), whose sum is σ = 47890525536. Its totient is φ = 6210473984.

The previous prime is 19556023313. The next prime is 19556023349. The reversal of 19556023332 is 23332065591.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1625443 + ... + 1637429.

It is an arithmetic number, because the mean of its divisors is an integer number (665146188).

Almost surely, 2^19556023332 is an apocalyptic number.

19556023332 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 19556023332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23945262768).

19556023332 is an abundant number, since it is smaller than the sum of its proper divisors (28334502204).

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

19556023332 is a wasteful number, since it uses less digits than its factorization.

19556023332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12297 (or 12272 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 39.

The spelling of 19556023332 in words is "nineteen billion, five hundred fifty-six million, twenty-three thousand, three hundred thirty-two".