21440175041 has 2 divisors, whose sum is σ = 21440175042. Its totient is φ = 21440175040.

The previous prime is 21440175037. The next prime is 21440175083. The reversal of 21440175041 is 14057104412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16282780816 + 5157394225 = 127604^2 + 71815^2 .

It is a cyclic number.

It is not a de Polignac number, because 21440175041 - 2² = 21440175037 is a prime.

It is a super-2 number, since 2×21440175041² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21440174995 and 21440175013.

It is not a weakly prime, because it can be changed into another prime (21440175011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720087520 + 10720087521.

It is an arithmetic number, because the mean of its divisors is an integer number (10720087521).

Almost surely, 2^21440175041 is an apocalyptic number.

It is an amenable number.

21440175041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21440175041 is an equidigital number, since it uses as much as digits as its factorization.

21440175041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 21440175041 its reverse (14057104412), we get a palindrome (35497279453).

The spelling of 21440175041 in words is "twenty-one billion, four hundred forty million, one hundred seventy-five thousand, forty-one".