20806086 has 24 divisors (see below), whose sum is σ = 48406680. Its totient is φ = 5944512.

The previous prime is 20806081. The next prime is 20806091. The reversal of 20806086 is 68060802.

It is an interprime number because it is at equal distance from previous prime (20806081) and next prime (20806091).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35091 + ... + 35678.

It is an arithmetic number, because the mean of its divisors is an integer number (2016945).

Almost surely, 2^20806086 is an apocalyptic number.

20806086 is an abundant number, since it is smaller than the sum of its proper divisors (27600594).

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

20806086 is a wasteful number, since it uses less digits than its factorization.

20806086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70788 (or 70781 counting only the distinct ones).

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

The square root of 20806086 is about 4561.3688734852. The cubic root of 20806086 is about 275.0405934566.

Adding to 20806086 its reverse (68060802), we get a palindrome (88866888).

The spelling of 20806086 in words is "twenty million, eight hundred six thousand, eighty-six".