20434235111 has 2 divisors, whose sum is σ = 20434235112. Its totient is φ = 20434235110.

The previous prime is 20434235089. The next prime is 20434235141. The reversal of 20434235111 is 11153243402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20434235111 - 2³⁴ = 3254365927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20434235141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217117555 + 10217117556.

It is an arithmetic number, because the mean of its divisors is an integer number (10217117556).

Almost surely, 2^20434235111 is an apocalyptic number.

20434235111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434235111 is an equidigital number, since it uses as much as digits as its factorization.

20434235111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20434235111 its reverse (11153243402), we get a palindrome (31587478513).

The spelling of 20434235111 in words is "twenty billion, four hundred thirty-four million, two hundred thirty-five thousand, one hundred eleven".