19825964944 has 80 divisors (see below), whose sum is σ = 41159829888. Its totient is φ = 9218533376.

The previous prime is 19825964923. The next prime is 19825964957. The reversal of 19825964944 is 44946952891.

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 15 ways as a sum of consecutive naturals, for example, 16210317 + ... + 16211539.

Almost surely, 2^19825964944 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 19825964944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20579914944).

19825964944 is an abundant number, since it is smaller than the sum of its proper divisors (21333864944).

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

19825964944 is a wasteful number, since it uses less digits than its factorization.

19825964944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1906 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 61.

The spelling of 19825964944 in words is "nineteen billion, eight hundred twenty-five million, nine hundred sixty-four thousand, nine hundred forty-four".