19944448 has 22 divisors (see below), whose sum is σ = 39871466. Its totient is φ = 9971712.

The previous prime is 19944391. The next prime is 19944469. The reversal of 19944448 is 84444991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18386944 + 1557504 = 4288^2 + 1248^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8715 + ... + 10762.

Almost surely, 2^19944448 is an apocalyptic number.

It is an amenable number.

19944448 is a deficient number, since it is larger than the sum of its proper divisors (19927018).

19944448 is an equidigital number, since it uses as much as digits as its factorization.

19944448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19497 (or 19479 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 19944448 is about 4465.9207337345. The cubic root of 19944448 is about 271.1902097329.

The spelling of 19944448 in words is "nineteen million, nine hundred forty-four thousand, four hundred forty-eight".