20351340323 has 2 divisors, whose sum is σ = 20351340324. Its totient is φ = 20351340322.

The previous prime is 20351340313. The next prime is 20351340343. The reversal of 20351340323 is 32304315302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20351340323 - 2²⁰ = 20350291747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20351340292 and 20351340301.

It is not a weakly prime, because it can be changed into another prime (20351340313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175670161 + 10175670162.

It is an arithmetic number, because the mean of its divisors is an integer number (10175670162).

Almost surely, 2^20351340323 is an apocalyptic number.

20351340323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20351340323 is an equidigital number, since it uses as much as digits as its factorization.

20351340323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 20351340323 its reverse (32304315302), we get a palindrome (52655655625).

The spelling of 20351340323 in words is "twenty billion, three hundred fifty-one million, three hundred forty thousand, three hundred twenty-three".