19808769882 has 64 divisors (see below), whose sum is σ = 43921686528. Its totient is φ = 5955087600.

The previous prime is 19808769863. The next prime is 19808769907. The reversal of 19808769882 is 28896780891.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1004457 + ... + 1023987.

It is an arithmetic number, because the mean of its divisors is an integer number (686276352).

Almost surely, 2^19808769882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19808769882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21960843264).

19808769882 is an abundant number, since it is smaller than the sum of its proper divisors (24112916646).

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

19808769882 is a wasteful number, since it uses less digits than its factorization.

19808769882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19696 (or 19674 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 66.

The spelling of 19808769882 in words is "nineteen billion, eight hundred eight million, seven hundred sixty-nine thousand, eight hundred eighty-two".