19974448 has 60 divisors (see below), whose sum is σ = 42887880. Its totient is φ = 9005568.

The previous prime is 19974443. The next prime is 19974469. The reversal of 19974448 is 84447991.

It is a junction number, because it is equal to n+sod(n) for n = 19974398 and 19974407.

It is not an unprimeable number, because it can be changed into a prime (19974443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224388 + ... + 224476.

It is an arithmetic number, because the mean of its divisors is an integer number (714798).

Almost surely, 2^19974448 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 19974448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21443940).

19974448 is an abundant number, since it is smaller than the sum of its proper divisors (22913432).

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

19974448 is a wasteful number, since it uses less digits than its factorization.

19974448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 187 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 19974448 is about 4469.2782415061. The cubic root of 19974448 is about 271.3261143970.

It can be divided in two parts, 199 and 74448, that added together give a palindrome (74647).

The spelling of 19974448 in words is "nineteen million, nine hundred seventy-four thousand, four hundred forty-eight".