20535334111 has 2 divisors, whose sum is σ = 20535334112. Its totient is φ = 20535334110.

The previous prime is 20535334109. The next prime is 20535334133. The reversal of 20535334111 is 11143353502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20535334111 - 2¹ = 20535334109 is a prime.

Together with 20535334109, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20535334111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20535334411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267667055 + 10267667056.

It is an arithmetic number, because the mean of its divisors is an integer number (10267667056).

Almost surely, 2^20535334111 is an apocalyptic number.

20535334111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535334111 is an equidigital number, since it uses as much as digits as its factorization.

20535334111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 20535334111 its reverse (11143353502), we get a palindrome (31678687613).

The spelling of 20535334111 in words is "twenty billion, five hundred thirty-five million, three hundred thirty-four thousand, one hundred eleven".