20668232 has 16 divisors (see below), whose sum is σ = 41734140. Its totient is φ = 9539136.

The previous prime is 20668229. The next prime is 20668247. The reversal of 20668232 is 23286602.

It can be written as a sum of positive squares in 2 ways, for example, as 20666116 + 2116 = 4546^2 + 46^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20668195 and 20668204.

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, 99263 + ... + 99470.

Almost surely, 2^20668232 is an apocalyptic number.

It is an amenable number.

20668232 is an abundant number, since it is smaller than the sum of its proper divisors (21065908).

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

20668232 is a wasteful number, since it uses less digits than its factorization.

20668232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198752 (or 198748 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20668232 is about 4546.2327261151. The cubic root of 20668232 is about 274.4318053385.

The spelling of 20668232 in words is "twenty million, six hundred sixty-eight thousand, two hundred thirty-two".