19929768 has 32 divisors (see below), whose sum is σ = 49934400. Its totient is φ = 6628608.

The previous prime is 19929743. The next prime is 19929781. The reversal of 19929768 is 86792991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19929768.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19248 + ... + 20256.

It is an arithmetic number, because the mean of its divisors is an integer number (1560450).

Almost surely, 2^19929768 is an apocalyptic number.

It is an amenable number.

19929768 is an abundant number, since it is smaller than the sum of its proper divisors (30004632).

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

19929768 is a wasteful number, since it uses less digits than its factorization.

19929768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1837 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 19929768 is about 4464.2768731341. The cubic root of 19929768 is about 271.1236573867.

The spelling of 19929768 in words is "nineteen million, nine hundred twenty-nine thousand, seven hundred sixty-eight".