20011103243 has 2 divisors, whose sum is σ = 20011103244. Its totient is φ = 20011103242.

The previous prime is 20011103237. The next prime is 20011103263. The reversal of 20011103243 is 34230111002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011103243 - 2⁸ = 20011102987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20011103263) 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 as a sum of consecutive naturals, namely, 10005551621 + 10005551622.

It is an arithmetic number, because the mean of its divisors is an integer number (10005551622).

Almost surely, 2^20011103243 is an apocalyptic number.

20011103243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011103243 is an equidigital number, since it uses as much as digits as its factorization.

20011103243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20011103243 its reverse (34230111002), we get a palindrome (54241214245).

The spelling of 20011103243 in words is "twenty billion, eleven million, one hundred three thousand, two hundred forty-three".