20321682 has 8 divisors (see below), whose sum is σ = 40643376. Its totient is φ = 6773892.

The previous prime is 20321669. The next prime is 20321687. The reversal of 20321682 is 28612302.

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

20321682 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20321687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693468 + ... + 1693479.

It is an arithmetic number, because the mean of its divisors is an integer number (5080422).

Almost surely, 2^20321682 is an apocalyptic number.

20321682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20321682 is a wasteful number, since it uses less digits than its factorization.

20321682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386952.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20321682 is about 4507.9576306793. The cubic root of 20321682 is about 272.8893270621.

Adding to 20321682 its reverse (28612302), we get a palindrome (48933984).

The spelling of 20321682 in words is "twenty million, three hundred twenty-one thousand, six hundred eighty-two".