19884668 has 6 divisors (see below), whose sum is σ = 34798176. Its totient is φ = 9942332.

The previous prime is 19884661. The next prime is 19884701. The reversal of 19884668 is 86648891.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19884661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2485580 + ... + 2485587.

It is an arithmetic number, because the mean of its divisors is an integer number (5799696).

Almost surely, 2^19884668 is an apocalyptic number.

It is an amenable number.

19884668 is a deficient number, since it is larger than the sum of its proper divisors (14913508).

19884668 is a wasteful number, since it uses less digits than its factorization.

19884668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4971171 (or 4971169 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 19884668 is about 4459.2228022381. Note that the first 3 decimals coincide. The cubic root of 19884668 is about 270.9189901424.

The spelling of 19884668 in words is "nineteen million, eight hundred eighty-four thousand, six hundred sixty-eight".