19925808 has 80 divisors (see below), whose sum is σ = 60758016. Its totient is φ = 5506560.

The previous prime is 19925783. The next prime is 19925831. The reversal of 19925808 is 80852991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 19925808.

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, 9460 + ... + 11372.

Almost surely, 2^19925808 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 19925808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30379008).

19925808 is an abundant number, since it is smaller than the sum of its proper divisors (40832208).

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

19925808 is a wasteful number, since it uses less digits than its factorization.

19925808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1956 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 19925808 is about 4463.8333302219. The cubic root of 19925808 is about 271.1056989772.

The spelling of 19925808 in words is "nineteen million, nine hundred twenty-five thousand, eight hundred eight".