20200243 has 12 divisors (see below), whose sum is σ = 23512240. Its totient is φ = 17000496.

The previous prime is 20200237. The next prime is 20200253. The reversal of 20200243 is 34200202.

It is not a de Polignac number, because 20200243 - 2¹⁷ = 20069171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200223) 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, 23953 + ... + 24781.

Almost surely, 2^20200243 is an apocalyptic number.

20200243 is a deficient number, since it is larger than the sum of its proper divisors (3311997).

20200243 is an frugal number, since it uses more digits than its factorization.

20200243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20200243 is about 4494.4680441627. The cubic root of 20200243 is about 272.3446602233.

Adding to 20200243 its reverse (34200202), we get a palindrome (54400445).

The spelling of 20200243 in words is "twenty million, two hundred thousand, two hundred forty-three".