19668614 has 16 divisors (see below), whose sum is σ = 34029600. Its totient is φ = 8351424.

The previous prime is 19668613. The next prime is 19668647. The reversal of 19668614 is 41686691.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19668613) 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 7 ways as a sum of consecutive naturals, for example, 4919 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (2126850).

Almost surely, 2^19668614 is an apocalyptic number.

19668614 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19668614 is a deficient number, since it is larger than the sum of its proper divisors (14360986).

19668614 is a wasteful number, since it uses less digits than its factorization.

19668614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007.

The product of its digits is 62208, while the sum is 41.

The square root of 19668614 is about 4434.9311155868. The cubic root of 19668614 is about 269.9342043610.

The spelling of 19668614 in words is "nineteen million, six hundred sixty-eight thousand, six hundred fourteen".