20680086 has 32 divisors (see below), whose sum is σ = 47980800. Its totient is φ = 5819616.

The previous prime is 20680073. The next prime is 20680087. The reversal of 20680086 is 68008602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861 + ... + 6488.

It is an arithmetic number, because the mean of its divisors is an integer number (1499400).

Almost surely, 2^20680086 is an apocalyptic number.

20680086 is an abundant number, since it is smaller than the sum of its proper divisors (27300714).

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

20680086 is a wasteful number, since it uses less digits than its factorization.

20680086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20680086 is about 4547.5362560402. The cubic root of 20680086 is about 274.4842609282.

Adding to 20680086 its reverse (68008602), we get a palindrome (88688688).

The spelling of 20680086 in words is "twenty million, six hundred eighty thousand, eighty-six".