19880974944 has 72 divisors (see below), whose sum is σ = 56652071112. Its totient is φ = 6613447680.

The previous prime is 19880974933. The next prime is 19880975011. The reversal of 19880974944 is 44947908891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71112 + ... + 211704.

It is an arithmetic number, because the mean of its divisors is an integer number (786834321).

Almost surely, 2^19880974944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19880974944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28326035556).

19880974944 is an abundant number, since it is smaller than the sum of its proper divisors (36771096168).

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

19880974944 is a wasteful number, since it uses less digits than its factorization.

19880974944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141100 (or 141089 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 19880974944 in words is "nineteen billion, eight hundred eighty million, nine hundred seventy-four thousand, nine hundred forty-four".