20102123323 has 2 divisors, whose sum is σ = 20102123324. Its totient is φ = 20102123322.

The previous prime is 20102123311. The next prime is 20102123351. The reversal of 20102123323 is 32332120102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102123323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102123323.

It is not a weakly prime, because it can be changed into another prime (20102123623) 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, 10051061661 + 10051061662.

It is an arithmetic number, because the mean of its divisors is an integer number (10051061662).

Almost surely, 2^20102123323 is an apocalyptic number.

20102123323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102123323 is an equidigital number, since it uses as much as digits as its factorization.

20102123323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20102123323 its reverse (32332120102), we get a palindrome (52434243425).

The spelling of 20102123323 in words is "twenty billion, one hundred two million, one hundred twenty-three thousand, three hundred twenty-three".