21444432041 has 2 divisors, whose sum is σ = 21444432042. Its totient is φ = 21444432040.

The previous prime is 21444432029. The next prime is 21444432047. The reversal of 21444432041 is 14023444412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15222377641 + 6222054400 = 123379^2 + 78880^2 .

It is a cyclic number.

It is not a de Polignac number, because 21444432041 - 2⁶ = 21444431977 is a prime.

It is a super-2 number, since 2×21444432041² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21444431995 and 21444432013.

It is not a weakly prime, because it can be changed into another prime (21444432047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722216020 + 10722216021.

It is an arithmetic number, because the mean of its divisors is an integer number (10722216021).

Almost surely, 2^21444432041 is an apocalyptic number.

It is an amenable number.

21444432041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21444432041 is an equidigital number, since it uses as much as digits as its factorization.

21444432041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21444432041 its reverse (14023444412), we get a palindrome (35467876453).

The spelling of 21444432041 in words is "twenty-one billion, four hundred forty-four million, four hundred thirty-two thousand, forty-one".