20356772041 has 2 divisors, whose sum is σ = 20356772042. Its totient is φ = 20356772040.

The previous prime is 20356772039. The next prime is 20356772057. The reversal of 20356772041 is 14027765302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18258765625 + 2098006416 = 135125^2 + 45804^2 .

It is a cyclic number.

It is not a de Polignac number, because 20356772041 - 2¹ = 20356772039 is a prime.

Together with 20356772039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20356772141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178386020 + 10178386021.

It is an arithmetic number, because the mean of its divisors is an integer number (10178386021).

Almost surely, 2^20356772041 is an apocalyptic number.

It is an amenable number.

20356772041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20356772041 is an equidigital number, since it uses as much as digits as its factorization.

20356772041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20356772041 in words is "twenty billion, three hundred fifty-six million, seven hundred seventy-two thousand, forty-one".