20303512 has 16 divisors (see below), whose sum is σ = 39297600. Its totient is φ = 9824160.

The previous prime is 20303489. The next prime is 20303513. The reversal of 20303512 is 21530302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303513) 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 3 ways as a sum of consecutive naturals, for example, 40687 + ... + 41182.

It is an arithmetic number, because the mean of its divisors is an integer number (2456100).

Almost surely, 2^20303512 is an apocalyptic number.

It is an amenable number.

20303512 is a deficient number, since it is larger than the sum of its proper divisors (18994088).

20303512 is a wasteful number, since it uses less digits than its factorization.

20303512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81906 (or 81902 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20303512 is about 4505.9418549289. The cubic root of 20303512 is about 272.8079709748.

Adding to 20303512 its reverse (21530302), we get a palindrome (41833814).

The spelling of 20303512 in words is "twenty million, three hundred three thousand, five hundred twelve".