19799824 has 80 divisors (see below), whose sum is σ = 45711360. Its totient is φ = 8208000.

The previous prime is 19799797. The next prime is 19799827. The reversal of 19799824 is 42899791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19799827) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 103569 + ... + 103759.

It is an arithmetic number, because the mean of its divisors is an integer number (571392).

Almost surely, 2^19799824 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 19799824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22855680).

19799824 is an abundant number, since it is smaller than the sum of its proper divisors (25911536).

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

19799824 is a wasteful number, since it uses less digits than its factorization.

19799824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 254 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The square root of 19799824 is about 4449.6993156842. The cubic root of 19799824 is about 270.5331213152.

The spelling of 19799824 in words is "nineteen million, seven hundred ninety-nine thousand, eight hundred twenty-four".