20806030 has 32 divisors (see below), whose sum is σ = 44665344. Its totient is φ = 6822816.

The previous prime is 20806003. The next prime is 20806039. The reversal of 20806030 is 3060802.

It is a junction number, because it is equal to n+sod(n) for n = 20805989 and 20806007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806039) 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, 4852 + ... + 8071.

It is an arithmetic number, because the mean of its divisors is an integer number (1395792).

Almost surely, 2^20806030 is an apocalyptic number.

20806030 is an abundant number, since it is smaller than the sum of its proper divisors (23859314).

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

20806030 is a wasteful number, since it uses less digits than its factorization.

20806030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20806030 is about 4561.3627349730. The cubic root of 20806030 is about 275.0403466973.

Adding to 20806030 its reverse (3060802), we get a palindrome (23866832).

The spelling of 20806030 in words is "twenty million, eight hundred six thousand, thirty".