20444123111 has 2 divisors, whose sum is σ = 20444123112. Its totient is φ = 20444123110.

The previous prime is 20444123083. The next prime is 20444123129. The reversal of 20444123111 is 11132144402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20444123111 - 2⁶ = 20444123047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20444123131) 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, 10222061555 + 10222061556.

It is an arithmetic number, because the mean of its divisors is an integer number (10222061556).

Almost surely, 2^20444123111 is an apocalyptic number.

20444123111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444123111 is an equidigital number, since it uses as much as digits as its factorization.

20444123111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 20444123111 its reverse (11132144402), we get a palindrome (31576267513).

The spelling of 20444123111 in words is "twenty billion, four hundred forty-four million, one hundred twenty-three thousand, one hundred eleven".