20530302 has 16 divisors (see below), whose sum is σ = 44219280. Its totient is φ = 6316992.

The previous prime is 20530291. The next prime is 20530309. The reversal of 20530302 is 20303502.

20530302 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×20530302² = 842986600422408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131527 + ... + 131682.

It is an arithmetic number, because the mean of its divisors is an integer number (2763705).

Almost surely, 2^20530302 is an apocalyptic number.

20530302 is an abundant number, since it is smaller than the sum of its proper divisors (23688978).

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

20530302 is a wasteful number, since it uses less digits than its factorization.

20530302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263227.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 20530302 is about 4531.0376295061. The cubic root of 20530302 is about 273.8199662700.

Adding to 20530302 its reverse (20303502), we get a palindrome (40833804).

The spelling of 20530302 in words is "twenty million, five hundred thirty thousand, three hundred two".