19966934 has 16 divisors (see below), whose sum is σ = 32665920. Its totient is φ = 9097920.

The previous prime is 19966931. The next prime is 19966943. The reversal of 19966934 is 43966991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19966931) 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 7 ways as a sum of consecutive naturals, for example, 2807 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (2041620).

Almost surely, 2^19966934 is an apocalyptic number.

19966934 is a deficient number, since it is larger than the sum of its proper divisors (12698986).

19966934 is a wasteful number, since it uses less digits than its factorization.

19966934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815.

The product of its digits is 314928, while the sum is 47.

The square root of 19966934 is about 4468.4375345304. The cubic root of 19966934 is about 271.2920875889.

The spelling of 19966934 in words is "nineteen million, nine hundred sixty-six thousand, nine hundred thirty-four".