20317057441 has 2 divisors, whose sum is σ = 20317057442. Its totient is φ = 20317057440.

The previous prime is 20317057403. The next prime is 20317057451. The reversal of 20317057441 is 14475071302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17707891041 + 2609166400 = 133071^2 + 51080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20317057441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20317057397 and 20317057406.

It is not a weakly prime, because it can be changed into another prime (20317057451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158528720 + 10158528721.

It is an arithmetic number, because the mean of its divisors is an integer number (10158528721).

Almost surely, 2^20317057441 is an apocalyptic number.

It is an amenable number.

20317057441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317057441 is an equidigital number, since it uses as much as digits as its factorization.

20317057441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 20317057441 in words is "twenty billion, three hundred seventeen million, fifty-seven thousand, four hundred forty-one".