19803452448 has 144 divisors (see below), whose sum is σ = 56440450080. Its totient is φ = 6077140992.

The previous prime is 19803452447. The next prime is 19803452453. The reversal of 19803452448 is 84425430891.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 19803452397 and 19803452406.

It is not an unprimeable number, because it can be changed into a prime (19803452447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7023583 + ... + 7026401.

It is an arithmetic number, because the mean of its divisors is an integer number (391947570).

Almost surely, 2^19803452448 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 19803452448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28220225040).

19803452448 is an abundant number, since it is smaller than the sum of its proper divisors (36636997632).

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

19803452448 is a wasteful number, since it uses less digits than its factorization.

19803452448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 3270 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 19803452448 in words is "nineteen billion, eight hundred three million, four hundred fifty-two thousand, four hundred forty-eight".