19999448 has 48 divisors (see below), whose sum is σ = 44029080. Its totient is φ = 8491392.

The previous prime is 19999439. The next prime is 19999471. The reversal of 19999448 is 84499991.

It is a self number, because there is not a number n which added to its sum of digits gives 19999448.

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 11 ways as a sum of consecutive naturals, for example, 63740 + ... + 64052.

Almost surely, 2^19999448 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 19999448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22014540).

19999448 is an abundant number, since it is smaller than the sum of its proper divisors (24029632).

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

19999448 is a wasteful number, since it uses less digits than its factorization.

19999448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 485 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 19999448 is about 4472.0742390976. The cubic root of 19999448 is about 271.4392643723.

The spelling of 19999448 in words is "nineteen million, nine hundred ninety-nine thousand, four hundred forty-eight".