20354311331 has 2 divisors, whose sum is σ = 20354311332. Its totient is φ = 20354311330.

The previous prime is 20354311267. The next prime is 20354311343. The reversal of 20354311331 is 13311345302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20354311331 - 2⁶ = 20354311267 is a prime.

It is a super-2 number, since 2×20354311331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20354311331.

It is not a weakly prime, because it can be changed into another prime (20354311031) 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, 10177155665 + 10177155666.

It is an arithmetic number, because the mean of its divisors is an integer number (10177155666).

Almost surely, 2^20354311331 is an apocalyptic number.

20354311331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354311331 is an equidigital number, since it uses as much as digits as its factorization.

20354311331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 20354311331 its reverse (13311345302), we get a palindrome (33665656633).

The spelling of 20354311331 in words is "twenty billion, three hundred fifty-four million, three hundred eleven thousand, three hundred thirty-one".