20434140412111 has 2 divisors, whose sum is σ = 20434140412112. Its totient is φ = 20434140412110.

The previous prime is 20434140412087. The next prime is 20434140412121. The reversal of 20434140412111 is 11121404143402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434140412111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20434140412111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20434140412121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217070206055 + 10217070206056.

It is an arithmetic number, because the mean of its divisors is an integer number (10217070206056).

Almost surely, 2^{20434140412111} is an apocalyptic number.

20434140412111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434140412111 is an equidigital number, since it uses as much as digits as its factorization.

20434140412111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 20434140412111 its reverse (11121404143402), we get a palindrome (31555544555513).

The spelling of 20434140412111 in words is "twenty trillion, four hundred thirty-four billion, one hundred forty million, four hundred twelve thousand, one hundred eleven".