20041686 has 72 divisors (see below), whose sum is σ = 52213824. Its totient is φ = 5533920.

The previous prime is 20041673. The next prime is 20041687. The reversal of 20041686 is 68614002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041687) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26976 + ... + 27708.

It is an arithmetic number, because the mean of its divisors is an integer number (725192).

Almost surely, 2^20041686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20041686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26106912).

20041686 is an abundant number, since it is smaller than the sum of its proper divisors (32172138).

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

20041686 is a wasteful number, since it uses less digits than its factorization.

20041686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20041686 is about 4476.7941654715. The cubic root of 20041686 is about 271.6302194738.

Adding to 20041686 its reverse (68614002), we get a palindrome (88655688).

The spelling of 20041686 in words is "twenty million, forty-one thousand, six hundred eighty-six".