20806130 has 16 divisors (see below), whose sum is σ = 39654360. Its totient is φ = 7832832.

The previous prime is 20806127. The next prime is 20806141. The reversal of 20806130 is 3160802.

It can be written as a sum of positive squares in 4 ways, for example, as 20638849 + 167281 = 4543^2 + 409^2 .

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, 61025 + ... + 61364.

Almost surely, 2^20806130 is an apocalyptic number.

20806130 is a deficient number, since it is larger than the sum of its proper divisors (18848230).

20806130 is a wasteful number, since it uses less digits than its factorization.

20806130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122413.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20806130 is about 4561.3736965962. The cubic root of 20806130 is about 275.0407873387.

Adding to 20806130 its reverse (3160802), we get a palindrome (23966932).

The spelling of 20806130 in words is "twenty million, eight hundred six thousand, one hundred thirty".