20653835611 has 2 divisors, whose sum is σ = 20653835612. Its totient is φ = 20653835610.

The previous prime is 20653835597. The next prime is 20653835621. The reversal of 20653835611 is 11653835602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20653835611 - 2⁹ = 20653835099 is a prime.

It is not a weakly prime, because it can be changed into another prime (20653835621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10326917805 + 10326917806.

It is an arithmetic number, because the mean of its divisors is an integer number (10326917806).

Almost surely, 2^20653835611 is an apocalyptic number.

20653835611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20653835611 is an equidigital number, since it uses as much as digits as its factorization.

20653835611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

Subtracting from 20653835611 its reverse (11653835602), we obtain a palindrome (9000000009).

The spelling of 20653835611 in words is "twenty billion, six hundred fifty-three million, eight hundred thirty-five thousand, six hundred eleven".