20205130 has 16 divisors (see below), whose sum is σ = 39675744. Its totient is φ = 7347280.

The previous prime is 20205121. The next prime is 20205139. The reversal of 20205130 is 3150202.

It is an interprime number because it is at equal distance from previous prime (20205121) and next prime (20205139).

It is a self number, because there is not a number n which added to its sum of digits gives 20205130.

It is not an unprimeable number, because it can be changed into a prime (20205139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91732 + ... + 91951.

It is an arithmetic number, because the mean of its divisors is an integer number (2479734).

Almost surely, 2^20205130 is an apocalyptic number.

20205130 is a deficient number, since it is larger than the sum of its proper divisors (19470614).

20205130 is a wasteful number, since it uses less digits than its factorization.

20205130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183701.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20205130 is about 4495.0116796289. The cubic root of 20205130 is about 272.3666210323.

Adding to 20205130 its reverse (3150202), we get a palindrome (23355332).

The spelling of 20205130 in words is "twenty million, two hundred five thousand, one hundred thirty".