20199684 has 24 divisors (see below), whose sum is σ = 47780320. Its totient is φ = 6640704.

The previous prime is 20199659. The next prime is 20199701. The reversal of 20199684 is 48699102.

It is a congruent number.

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, 10654 + ... + 12405.

Almost surely, 2^20199684 is an apocalyptic number.

It is an amenable number.

20199684 is an abundant number, since it is smaller than the sum of its proper divisors (27580636).

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

20199684 is a wasteful number, since it uses less digits than its factorization.

20199684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23139 (or 23137 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20199684 is about 4494.4058561728. The cubic root of 20199684 is about 272.3421480081.

The spelling of 20199684 in words is "twenty million, one hundred ninety-nine thousand, six hundred eighty-four".