20320355351 has 2 divisors, whose sum is σ = 20320355352. Its totient is φ = 20320355350.

The previous prime is 20320355347. The next prime is 20320355369. The reversal of 20320355351 is 15355302302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20320355351 - 2² = 20320355347 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320355381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160177675 + 10160177676.

It is an arithmetic number, because the mean of its divisors is an integer number (10160177676).

Almost surely, 2^20320355351 is an apocalyptic number.

20320355351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320355351 is an equidigital number, since it uses as much as digits as its factorization.

20320355351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 29.

Adding to 20320355351 its reverse (15355302302), we get a palindrome (35675657653).

The spelling of 20320355351 in words is "twenty billion, three hundred twenty million, three hundred fifty-five thousand, three hundred fifty-one".