20043431311111 has 16 divisors (see below), whose sum is σ = 21945850754464. Its totient is φ = 18194032733184.

The previous prime is 20043431311109. The next prime is 20043431311139. The reversal of 20043431311111 is 11111313434002.

It is a cyclic number.

It is not a de Polignac number, because 20043431311111 - 2¹ = 20043431311109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043431311181) 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, 31016361 + ... + 31655986.

It is an arithmetic number, because the mean of its divisors is an integer number (1371615672154).

Almost surely, 2^{20043431311111} is an apocalyptic number.

20043431311111 is a deficient number, since it is larger than the sum of its proper divisors (1902419443353).

20043431311111 is a wasteful number, since it uses less digits than its factorization.

20043431311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62672770.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 20043431311111 its reverse (11111313434002), we get a palindrome (31154744745113).

The spelling of 20043431311111 in words is "twenty trillion, forty-three billion, four hundred thirty-one million, three hundred eleven thousand, one hundred eleven".