20107686 has 16 divisors (see below), whose sum is σ = 40614768. Its totient is φ = 6636000.

The previous prime is 20107679. The next prime is 20107691. The reversal of 20107686 is 68670102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15985 + ... + 17196.

It is an arithmetic number, because the mean of its divisors is an integer number (2538423).

Almost surely, 2^20107686 is an apocalyptic number.

20107686 is an abundant number, since it is smaller than the sum of its proper divisors (20507082).

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

20107686 is a wasteful number, since it uses less digits than its factorization.

20107686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33287.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20107686 is about 4484.1594530079. The cubic root of 20107686 is about 271.9280645266.

Adding to 20107686 its reverse (68670102), we get a palindrome (88777788).

The spelling of 20107686 in words is "twenty million, one hundred seven thousand, six hundred eighty-six".