19844874 has 48 divisors (see below), whose sum is σ = 50843520. Its totient is φ = 5473440.

The previous prime is 19844849. The next prime is 19844897. The reversal of 19844874 is 47844891.

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 23 ways as a sum of consecutive naturals, for example, 939 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (1059240).

Almost surely, 2^19844874 is an apocalyptic number.

19844874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19844874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25421760).

19844874 is an abundant number, since it is smaller than the sum of its proper divisors (30998646).

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

19844874 is a wasteful number, since it uses less digits than its factorization.

19844874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475 (or 5472 counting only the distinct ones).

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

The square root of 19844874 is about 4454.7585793172. The cubic root of 19844874 is about 270.7381447785.

The spelling of 19844874 in words is "nineteen million, eight hundred forty-four thousand, eight hundred seventy-four".