19899448 has 8 divisors (see below), whose sum is σ = 37311480. Its totient is φ = 9949720.

The previous prime is 19899443. The next prime is 19899449. The reversal of 19899448 is 84499891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 19899395 and 19899404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19899443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1243708 + ... + 1243723.

It is an arithmetic number, because the mean of its divisors is an integer number (4663935).

Almost surely, 2^19899448 is an apocalyptic number.

It is an amenable number.

19899448 is a deficient number, since it is larger than the sum of its proper divisors (17412032).

19899448 is a wasteful number, since it uses less digits than its factorization.

19899448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487437 (or 2487433 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 19899448 is about 4460.8797338642. The cubic root of 19899448 is about 270.9860969706.

The spelling of 19899448 in words is "nineteen million, eight hundred ninety-nine thousand, four hundred forty-eight".