20535222313 has 2 divisors, whose sum is σ = 20535222314. Its totient is φ = 20535222312.

The previous prime is 20535222269. The next prime is 20535222353. The reversal of 20535222313 is 31322253502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20418409449 + 116812864 = 142893^2 + 10808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20535222313 is a prime.

It is not a weakly prime, because it can be changed into another prime (20535222353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267611156 + 10267611157.

It is an arithmetic number, because the mean of its divisors is an integer number (10267611157).

Almost surely, 2^20535222313 is an apocalyptic number.

It is an amenable number.

20535222313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535222313 is an equidigital number, since it uses as much as digits as its factorization.

20535222313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 20535222313 its reverse (31322253502), we get a palindrome (51857475815).

The spelling of 20535222313 in words is "twenty billion, five hundred thirty-five million, two hundred twenty-two thousand, three hundred thirteen".