19973982 has 96 divisors (see below), whose sum is σ = 50964480. Its totient is φ = 5100480.

The previous prime is 19973977. The next prime is 19974001. The reversal of 19973982 is 28937991.

It is a congruent number.

It is an unprimeable number.

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, 644307 + ... + 644337.

It is an arithmetic number, because the mean of its divisors is an integer number (530880).

Almost surely, 2^19973982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19973982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25482240).

19973982 is an abundant number, since it is smaller than the sum of its proper divisors (30990498).

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

19973982 is a wasteful number, since it uses less digits than its factorization.

19973982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 95 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 19973982 is about 4469.2261075045. The cubic root of 19973982 is about 271.3240043853.

The spelling of 19973982 in words is "nineteen million, nine hundred seventy-three thousand, nine hundred eighty-two".