19668698 has 24 divisors (see below), whose sum is σ = 34473600. Its totient is φ = 8391768.

The previous prime is 19668683. The next prime is 19668707. The reversal of 19668698 is 89686691.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 40823 + ... + 41301.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^19668698 is an apocalyptic number.

19668698 is a deficient number, since it is larger than the sum of its proper divisors (14804902).

19668698 is a wasteful number, since it uses less digits than its factorization.

19668698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 907 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 53.

The square root of 19668698 is about 4434.9405858478. The cubic root of 19668698 is about 269.9345886355.

The spelling of 19668698 in words is "nineteen million, six hundred sixty-eight thousand, six hundred ninety-eight".