19668933 has 32 divisors (see below), whose sum is σ = 32025600. Its totient is φ = 11875248.

The previous prime is 19668923. The next prime is 19668937. The reversal of 19668933 is 33986691.

It is not a de Polignac number, because 19668933 - 2⁹ = 19668421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19668937) 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 31 ways as a sum of consecutive naturals, for example, 10966 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (1000800).

Almost surely, 2^19668933 is an apocalyptic number.

It is an amenable number.

19668933 is a deficient number, since it is larger than the sum of its proper divisors (12356667).

19668933 is a wasteful number, since it uses less digits than its factorization.

19668933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718 (or 1712 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 19668933 is about 4434.9670799229. The cubic root of 19668933 is about 269.9356636833.

The spelling of 19668933 in words is "nineteen million, six hundred sixty-eight thousand, nine hundred thirty-three".