20204243 has 2 divisors, whose sum is σ = 20204244. Its totient is φ = 20204242.

The previous prime is 20204231. The next prime is 20204269. The reversal of 20204243 is 34240202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20204243 - 2⁶ = 20204179 is a prime.

It is a super-2 number, since 2×20204243² = 816422870406098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20204203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102121 + 10102122.

It is an arithmetic number, because the mean of its divisors is an integer number (10102122).

Almost surely, 2^20204243 is an apocalyptic number.

20204243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204243 is an equidigital number, since it uses as much as digits as its factorization.

20204243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20204243 is about 4494.9130136188. The cubic root of 20204243 is about 272.3626353658.

Adding to 20204243 its reverse (34240202), we get a palindrome (54444445).

The spelling of 20204243 in words is "twenty million, two hundred four thousand, two hundred forty-three".