21444432127 has 2 divisors, whose sum is σ = 21444432128. Its totient is φ = 21444432126.

The previous prime is 21444432083. The next prime is 21444432143. The reversal of 21444432127 is 72123444412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21444432127 - 2¹⁹ = 21443907839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21444432092 and 21444432101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21444430127) 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, 10722216063 + 10722216064.

It is an arithmetic number, because the mean of its divisors is an integer number (10722216064).

Almost surely, 2^21444432127 is an apocalyptic number.

21444432127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21444432127 is an equidigital number, since it uses as much as digits as its factorization.

21444432127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 34.

Adding to 21444432127 its reverse (72123444412), we get a palindrome (93567876539).

The spelling of 21444432127 in words is "twenty-one billion, four hundred forty-four million, four hundred thirty-two thousand, one hundred twenty-seven".