19849808 has 30 divisors (see below), whose sum is σ = 42277242. Its totient is φ = 9021760.

The previous prime is 19849807. The next prime is 19849849. The reversal of 19849808 is 80894891.

It can be written as a sum of positive squares in only one way, i.e., 13337104 + 6512704 = 3652^2 + 2552^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19849801) 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 5 ways as a sum of consecutive naturals, for example, 3191 + ... + 7062.

Almost surely, 2^19849808 is an apocalyptic number.

It is an amenable number.

19849808 is an abundant number, since it is smaller than the sum of its proper divisors (22427434).

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

19849808 is a wasteful number, since it uses less digits than its factorization.

19849808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10283 (or 10266 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 19849808 is about 4455.3123347303. The cubic root of 19849808 is about 270.7605806531.

The spelling of 19849808 in words is "nineteen million, eight hundred forty-nine thousand, eight hundred eight".