20330686 has 8 divisors (see below), whose sum is σ = 31320360. Its totient is φ = 9890568.

The previous prime is 20330683. The next prime is 20330693. The reversal of 20330686 is 68603302.

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 (20330683) 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, 137296 + ... + 137443.

It is an arithmetic number, because the mean of its divisors is an integer number (3915045).

Almost surely, 2^20330686 is an apocalyptic number.

20330686 is a deficient number, since it is larger than the sum of its proper divisors (10989674).

20330686 is a wasteful number, since it uses less digits than its factorization.

20330686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274778.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20330686 is about 4508.9561985009. The cubic root of 20330686 is about 272.9296244597.

Adding to 20330686 its reverse (68603302), we get a palindrome (88933988).

The spelling of 20330686 in words is "twenty million, three hundred thirty thousand, six hundred eighty-six".