19668632 has 16 divisors (see below), whose sum is σ = 38068800. Its totient is φ = 9516960.

The previous prime is 19668613. The next prime is 19668647. The reversal of 19668632 is 23686691.

It is a self number, because there is not a number n which added to its sum of digits gives 19668632.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39407 + ... + 39902.

It is an arithmetic number, because the mean of its divisors is an integer number (2379300).

Almost surely, 2^19668632 is an apocalyptic number.

It is an amenable number.

19668632 is a deficient number, since it is larger than the sum of its proper divisors (18400168).

19668632 is a wasteful number, since it uses less digits than its factorization.

19668632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79346 (or 79342 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 19668632 is about 4434.9331449301. The cubic root of 19668632 is about 269.9342867056.

The spelling of 19668632 in words is "nineteen million, six hundred sixty-eight thousand, six hundred thirty-two".