20111043203 has 4 divisors (see below), whose sum is σ = 20111376360. Its totient is φ = 20110710048.

The previous prime is 20111043191. The next prime is 20111043223. The reversal of 20111043203 is 30234011102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20111043203 - 2⁴ = 20111043187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111043223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47798 + ... + 206171.

It is an arithmetic number, because the mean of its divisors is an integer number (5027844090).

Almost surely, 2^20111043203 is an apocalyptic number.

20111043203 is a deficient number, since it is larger than the sum of its proper divisors (333157).

20111043203 is an equidigital number, since it uses as much as digits as its factorization.

20111043203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333156.

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

Adding to 20111043203 its reverse (30234011102), we get a palindrome (50345054305).

The spelling of 20111043203 in words is "twenty billion, one hundred eleven million, forty-three thousand, two hundred three".