19708868 has 12 divisors (see below), whose sum is σ = 34521900. Its totient is φ = 9845472.

The previous prime is 19708867. The next prime is 19708873. The reversal of 19708868 is 86880791.

It can be written as a sum of positive squares in 2 ways, for example, as 16144324 + 3564544 = 4018^2 + 1888^2 .

It is not an unprimeable number, because it can be changed into a prime (19708867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6458 + ... + 9006.

It is an arithmetic number, because the mean of its divisors is an integer number (2876825).

Almost surely, 2^19708868 is an apocalyptic number.

It is an amenable number.

19708868 is a deficient number, since it is larger than the sum of its proper divisors (14813032).

19708868 is a wasteful number, since it uses less digits than its factorization.

19708868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486 (or 4484 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 19708868 is about 4439.4670851353. The cubic root of 19708868 is about 270.1182289716.

The spelling of 19708868 in words is "nineteen million, seven hundred eight thousand, eight hundred sixty-eight".