19968788 has 12 divisors (see below), whose sum is σ = 39937632. Its totient is φ = 8558040.

The previous prime is 19968779. The next prime is 19968797. The reversal of 19968788 is 88786991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19968779) and next prime (19968797).

19968788 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356558 + ... + 356613.

It is an arithmetic number, because the mean of its divisors is an integer number (3328136).

Almost surely, 2^19968788 is an apocalyptic number.

It is an amenable number.

19968788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19968788 is a wasteful number, since it uses less digits than its factorization.

19968788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713182 (or 713180 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 56.

The square root of 19968788 is about 4468.6449847801. The cubic root of 19968788 is about 271.3004841370.

The spelling of 19968788 in words is "nineteen million, nine hundred sixty-eight thousand, seven hundred eighty-eight".