20533835191 has 2 divisors, whose sum is σ = 20533835192. Its totient is φ = 20533835190.

The previous prime is 20533835171. The next prime is 20533835221. The reversal of 20533835191 is 19153833502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20533835191 - 2⁵ = 20533835159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20533835131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266917595 + 10266917596.

It is an arithmetic number, because the mean of its divisors is an integer number (10266917596).

Almost surely, 2^20533835191 is an apocalyptic number.

20533835191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533835191 is an equidigital number, since it uses as much as digits as its factorization.

20533835191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 20533835191 in words is "twenty billion, five hundred thirty-three million, eight hundred thirty-five thousand, one hundred ninety-one".