19811248 has 20 divisors (see below), whose sum is σ = 38559040. Its totient is φ = 9860544.

The previous prime is 19811237. The next prime is 19811249. The reversal of 19811248 is 84211891.

It is not an unprimeable number, because it can be changed into a prime (19811249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (1927952).

Almost surely, 2^19811248 is an apocalyptic number.

It is an amenable number.

19811248 is a deficient number, since it is larger than the sum of its proper divisors (18747792).

19811248 is a wasteful number, since it uses less digits than its factorization.

19811248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644 (or 5638 counting only the distinct ones).

The product of its digits is 4608, while the sum is 34.

The square root of 19811248 is about 4450.9828128179. The cubic root of 19811248 is about 270.5851415785.

The spelling of 19811248 in words is "nineteen million, eight hundred eleven thousand, two hundred forty-eight".