19799808 has 144 divisors (see below), whose sum is σ = 62791680. Its totient is φ = 5419008.

The previous prime is 19799797. The next prime is 19799827. The reversal of 19799808 is 80899791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155841 + ... + 155967.

Almost surely, 2^19799808 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 19799808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395840).

19799808 is an abundant number, since it is smaller than the sum of its proper divisors (42991872).

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

19799808 is a wasteful number, since it uses less digits than its factorization.

19799808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 19799808 is about 4449.6975178095. The cubic root of 19799808 is about 270.5330484436.

The spelling of 19799808 in words is "nineteen million, seven hundred ninety-nine thousand, eight hundred eight".