20432243317 has 2 divisors, whose sum is σ = 20432243318. Its totient is φ = 20432243316.

The previous prime is 20432243311. The next prime is 20432243323. The reversal of 20432243317 is 71334223402.

It is a balanced prime because it is at equal distance from previous prime (20432243311) and next prime (20432243323).

It can be written as a sum of positive squares in only one way, i.e., 16862061316 + 3570182001 = 129854^2 + 59751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20432243317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20432243311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216121658 + 10216121659.

It is an arithmetic number, because the mean of its divisors is an integer number (10216121659).

Almost surely, 2^20432243317 is an apocalyptic number.

It is an amenable number.

20432243317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432243317 is an equidigital number, since it uses as much as digits as its factorization.

20432243317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 31.

Adding to 20432243317 its reverse (71334223402), we get a palindrome (91766466719).

The spelling of 20432243317 in words is "twenty billion, four hundred thirty-two million, two hundred forty-three thousand, three hundred seventeen".