20123210351 has 2 divisors, whose sum is σ = 20123210352. Its totient is φ = 20123210350.

The previous prime is 20123210329. The next prime is 20123210353. The reversal of 20123210351 is 15301232102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123210351 is a prime.

Together with 20123210353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123210353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061605175 + 10061605176.

It is an arithmetic number, because the mean of its divisors is an integer number (10061605176).

Almost surely, 2^20123210351 is an apocalyptic number.

20123210351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123210351 is an equidigital number, since it uses as much as digits as its factorization.

20123210351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20123210351 its reverse (15301232102), we get a palindrome (35424442453).

The spelling of 20123210351 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, three hundred fifty-one".