19880982 has 96 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 5616000.

The previous prime is 19880981. The next prime is 19881019. The reversal of 19880982 is 28908891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19880981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251619 + ... + 251697.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^19880982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19880982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25159680).

19880982 is an abundant number, since it is smaller than the sum of its proper divisors (30438378).

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

19880982 is a wasteful number, since it uses less digits than its factorization.

19880982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 19880982 is about 4458.8094823619. The cubic root of 19880982 is about 270.9022491185.

It can be divided in two parts, 1988098 and 2, that added together give a square (1988100 = 1410²).

The spelling of 19880982 in words is "nineteen million, eight hundred eighty thousand, nine hundred eighty-two".