19321856980 has 24 divisors (see below), whose sum is σ = 41439218688. Its totient is φ = 7564301088.

The previous prime is 19321856899. The next prime is 19321856989. The reversal of 19321856980 is 8965812391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19321856989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10276644 + ... + 10278523.

It is an arithmetic number, because the mean of its divisors is an integer number (1726634112).

Almost surely, 2^19321856980 is an apocalyptic number.

19321856980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19321856980 is an abundant number, since it is smaller than the sum of its proper divisors (22117361708).

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

19321856980 is a wasteful number, since it uses less digits than its factorization.

19321856980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20555223 (or 20555221 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 19321856980 in words is "nineteen billion, three hundred twenty-one million, eight hundred fifty-six thousand, nine hundred eighty".