20110243 has 2 divisors, whose sum is σ = 20110244. Its totient is φ = 20110242.

The previous prime is 20110241. The next prime is 20110273. The reversal of 20110243 is 34201102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110243 - 2¹ = 20110241 is a prime.

Together with 20110241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20110241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055121 + 10055122.

It is an arithmetic number, because the mean of its divisors is an integer number (10055122).

Almost surely, 2^20110243 is an apocalyptic number.

20110243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110243 is an equidigital number, since it uses as much as digits as its factorization.

20110243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20110243 is about 4484.4445586940. Note that the first 3 decimals coincide. The cubic root of 20110243 is about 271.9395906430.

Adding to 20110243 its reverse (34201102), we get a palindrome (54311345).

The spelling of 20110243 in words is "twenty million, one hundred ten thousand, two hundred forty-three".