21444332041 has 4 divisors (see below), whose sum is σ = 23393816784. Its totient is φ = 19494847300.

The previous prime is 21444332023. The next prime is 21444332089. The reversal of 21444332041 is 14023344412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21444332041 - 2¹⁷ = 21444200969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21444332341) 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, 974742355 + ... + 974742376.

It is an arithmetic number, because the mean of its divisors is an integer number (5848454196).

Almost surely, 2^21444332041 is an apocalyptic number.

It is an amenable number.

21444332041 is a deficient number, since it is larger than the sum of its proper divisors (1949484743).

21444332041 is a wasteful number, since it uses less digits than its factorization.

21444332041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949484742.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21444332041 its reverse (14023344412), we get a palindrome (35467676453).

The spelling of 21444332041 in words is "twenty-one billion, four hundred forty-four million, three hundred thirty-two thousand, forty-one".