20806084 has 24 divisors (see below), whose sum is σ = 40479488. Its totient is φ = 9292320.

The previous prime is 20806081. The next prime is 20806091. The reversal of 20806084 is 48060802.

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 7 ways as a sum of consecutive naturals, for example, 4842 + ... + 8065.

Almost surely, 2^20806084 is an apocalyptic number.

It is an amenable number.

20806084 is a deficient number, since it is larger than the sum of its proper divisors (19673404).

20806084 is a wasteful number, since it uses less digits than its factorization.

20806084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12955 (or 12953 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20806084 is about 4561.3686542528. The cubic root of 20806084 is about 275.0405846438.

Adding to 20806084 its reverse (48060802), we get a palindrome (68866886).

The spelling of 20806084 in words is "twenty million, eight hundred six thousand, eighty-four".