20846607191 has 2 divisors, whose sum is σ = 20846607192. Its totient is φ = 20846607190.

The previous prime is 20846607181. The next prime is 20846607203. The reversal of 20846607191 is 19170664802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20846607191 - 2⁶ = 20846607127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20846607121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10423303595 + 10423303596.

It is an arithmetic number, because the mean of its divisors is an integer number (10423303596).

Almost surely, 2^20846607191 is an apocalyptic number.

20846607191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20846607191 is an equidigital number, since it uses as much as digits as its factorization.

20846607191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 20846607191 in words is "twenty billion, eight hundred forty-six million, six hundred seven thousand, one hundred ninety-one".