20123100443 has 2 divisors, whose sum is σ = 20123100444. Its totient is φ = 20123100442.

The previous prime is 20123100427. The next prime is 20123100451. The reversal of 20123100443 is 34400132102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20123100443 - 2⁴ = 20123100427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20123100043) 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, 10061550221 + 10061550222.

It is an arithmetic number, because the mean of its divisors is an integer number (10061550222).

Almost surely, 2^20123100443 is an apocalyptic number.

20123100443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123100443 is an equidigital number, since it uses as much as digits as its factorization.

20123100443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20123100443 its reverse (34400132102), we get a palindrome (54523232545).

The spelling of 20123100443 in words is "twenty billion, one hundred twenty-three million, one hundred thousand, four hundred forty-three".