20681035 has 8 divisors (see below), whose sum is σ = 24847200. Its totient is φ = 16524864.

The previous prime is 20681033. The next prime is 20681041. The reversal of 20681035 is 53018602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20681035 - 2¹ = 20681033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20681033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3274 + ... + 7216.

It is an arithmetic number, because the mean of its divisors is an integer number (3105900).

Almost surely, 2^20681035 is an apocalyptic number.

20681035 is a deficient number, since it is larger than the sum of its proper divisors (4166165).

20681035 is a wasteful number, since it uses less digits than its factorization.

20681035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20681035 is about 4547.6405970569. The cubic root of 20681035 is about 274.4884595177.

Adding to 20681035 its reverse (53018602), we get a palindrome (73699637).

The spelling of 20681035 in words is "twenty million, six hundred eighty-one thousand, thirty-five".