20396244961 has 2 divisors, whose sum is σ = 20396244962. Its totient is φ = 20396244960.

The previous prime is 20396244941. The next prime is 20396244977. The reversal of 20396244961 is 16944269302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18948899025 + 1447345936 = 137655^2 + 38044^2 .

It is a cyclic number.

It is not a de Polignac number, because 20396244961 - 2⁵ = 20396244929 is a prime.

It is not a weakly prime, because it can be changed into another prime (20396244941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198122480 + 10198122481.

It is an arithmetic number, because the mean of its divisors is an integer number (10198122481).

Almost surely, 2^20396244961 is an apocalyptic number.

It is an amenable number.

20396244961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20396244961 is an equidigital number, since it uses as much as digits as its factorization.

20396244961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 20396244961 in words is "twenty billion, three hundred ninety-six million, two hundred forty-four thousand, nine hundred sixty-one".