20043111 has 16 divisors (see below), whose sum is σ = 29236608. Its totient is φ = 12112800.

The previous prime is 20043083. The next prime is 20043151. The reversal of 20043111 is 11134002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20043111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15585 + ... + 16821.

It is an arithmetic number, because the mean of its divisors is an integer number (1827288).

Almost surely, 2^20043111 is an apocalyptic number.

20043111 is a deficient number, since it is larger than the sum of its proper divisors (9193497).

20043111 is a wasteful number, since it uses less digits than its factorization.

20043111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20043111 is about 4476.9533167099. The cubic root of 20043111 is about 271.6366571206.

Adding to 20043111 its reverse (11134002), we get a palindrome (31177113).

It can be divided in two parts, 2004 and 3111, that added together give a palindrome (5115).

The spelling of 20043111 in words is "twenty million, forty-three thousand, one hundred eleven".