21414144041 has 4 divisors (see below), whose sum is σ = 21447552084. Its totient is φ = 21380736000.

The previous prime is 21414144029. The next prime is 21414144049. The reversal of 21414144041 is 14044141412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16992426025 + 4421718016 = 130355^2 + 66496^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414144041 - 2¹⁸ = 21413881897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21414144041.

It is not an unprimeable number, because it can be changed into a prime (21414144049) 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 in 3 ways as a sum of consecutive naturals, for example, 16703060 + ... + 16704341.

It is an arithmetic number, because the mean of its divisors is an integer number (5361888021).

Almost surely, 2^21414144041 is an apocalyptic number.

It is an amenable number.

21414144041 is a deficient number, since it is larger than the sum of its proper divisors (33408043).

21414144041 is an equidigital number, since it uses as much as digits as its factorization.

21414144041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33408042.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 21414144041 its reverse (14044141412), we get a palindrome (35458285453).

The spelling of 21414144041 in words is "twenty-one billion, four hundred fourteen million, one hundred forty-four thousand, forty-one".