20432686 has 8 divisors (see below), whose sum is σ = 31301280. Its totient is φ = 9998928.

The previous prime is 20432683. The next prime is 20432701. The reversal of 20432686 is 68623402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108591 + ... + 108778.

It is an arithmetic number, because the mean of its divisors is an integer number (3912660).

Almost surely, 2^20432686 is an apocalyptic number.

20432686 is a deficient number, since it is larger than the sum of its proper divisors (10868594).

20432686 is a wasteful number, since it uses less digits than its factorization.

20432686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217418.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 20432686 is about 4520.2528690329. The cubic root of 20432686 is about 273.3852968163.

The spelling of 20432686 in words is "twenty million, four hundred thirty-two thousand, six hundred eighty-six".