20343123347 has 2 divisors, whose sum is σ = 20343123348. Its totient is φ = 20343123346.

The previous prime is 20343123257. The next prime is 20343123349. The reversal of 20343123347 is 74332134302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20343123347 - 2¹⁰ = 20343122323 is a prime.

It is a super-2 number, since 2×20343123347² (a number of 21 digits) contains 22 as substring.

Together with 20343123349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20343123349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171561673 + 10171561674.

It is an arithmetic number, because the mean of its divisors is an integer number (10171561674).

Almost surely, 2^20343123347 is an apocalyptic number.

20343123347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343123347 is an equidigital number, since it uses as much as digits as its factorization.

20343123347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 32.

Adding to 20343123347 its reverse (74332134302), we get a palindrome (94675257649).

The spelling of 20343123347 in words is "twenty billion, three hundred forty-three million, one hundred twenty-three thousand, three hundred forty-seven".