20303073 has 12 divisors (see below), whose sum is σ = 33516288. Its totient is φ = 11601720.

The previous prime is 20303071. The next prime is 20303111. The reversal of 20303073 is 37030302.

It is not a de Polignac number, because 20303073 - 2¹ = 20303071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20303071) 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 11 ways as a sum of consecutive naturals, for example, 161073 + ... + 161198.

It is an arithmetic number, because the mean of its divisors is an integer number (2793024).

Almost surely, 2^20303073 is an apocalyptic number.

It is an amenable number.

20303073 is a deficient number, since it is larger than the sum of its proper divisors (13213215).

20303073 is a wasteful number, since it uses less digits than its factorization.

20303073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322284 (or 322281 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 18.

The square root of 20303073 is about 4505.8931412096. The cubic root of 20303073 is about 272.8060047540.

Adding to 20303073 its reverse (37030302), we get a palindrome (57333375).

The spelling of 20303073 in words is "twenty million, three hundred three thousand, seventy-three".