19944808 has 64 divisors (see below), whose sum is σ = 44226000. Its totient is φ = 8343552.

The previous prime is 19944797. The next prime is 19944829. The reversal of 19944808 is 80844991.

It can be written as a sum of positive squares in 8 ways, for example, as 6563844 + 13380964 = 2562^2 + 3658^2 .

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, 51078 + ... + 51466.

Almost surely, 2^19944808 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 19944808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22113000).

19944808 is an abundant number, since it is smaller than the sum of its proper divisors (24281192).

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

19944808 is a wasteful number, since it uses less digits than its factorization.

19944808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 19944808 is about 4465.9610387911. The cubic root of 19944808 is about 271.1918413965.

The spelling of 19944808 in words is "nineteen million, nine hundred forty-four thousand, eight hundred eight".