20461120361191 has 2 divisors, whose sum is σ = 20461120361192. Its totient is φ = 20461120361190.

The previous prime is 20461120361147. The next prime is 20461120361233. The reversal of 20461120361191 is 19116302116402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20461120361191 - 2¹¹ = 20461120359143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20461120361191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20461120361791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230560180595 + 10230560180596.

It is an arithmetic number, because the mean of its divisors is an integer number (10230560180596).

Almost surely, 2^{20461120361191} is an apocalyptic number.

20461120361191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461120361191 is an equidigital number, since it uses as much as digits as its factorization.

20461120361191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

Adding to 20461120361191 its reverse (19116302116402), we get a palindrome (39577422477593).

The spelling of 20461120361191 in words is "twenty trillion, four hundred sixty-one billion, one hundred twenty million, three hundred sixty-one thousand, one hundred ninety-one".