19874844 has 72 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 5824800.

The previous prime is 19874839. The next prime is 19874851. The reversal of 19874844 is 44847891.

It is a self number, because there is not a number n which added to its sum of digits gives 19874844.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11467 + ... + 13085.

It is an arithmetic number, because the mean of its divisors is an integer number (786240).

Almost surely, 2^19874844 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 19874844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28304640).

19874844 is an abundant number, since it is smaller than the sum of its proper divisors (36734436).

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

19874844 is a wasteful number, since it uses less digits than its factorization.

19874844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1666 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 19874844 is about 4458.1211289062. The cubic root of 19874844 is about 270.8743670424.

The spelling of 19874844 in words is "nineteen million, eight hundred seventy-four thousand, eight hundred forty-four".