21441037 has 4 divisors (see below), whose sum is σ = 22373280. Its totient is φ = 20508796.

The previous prime is 21441031. The next prime is 21441089. The reversal of 21441037 is 73014412.

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 a de Polignac number, because none of the positive numbers 2^k-21441037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21440999 and 21441017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466087 + ... + 466132.

It is an arithmetic number, because the mean of its divisors is an integer number (5593320).

Almost surely, 2^21441037 is an apocalyptic number.

It is an amenable number.

21441037 is a deficient number, since it is larger than the sum of its proper divisors (932243).

21441037 is an equidigital number, since it uses as much as digits as its factorization.

21441037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932242.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 21441037 is about 4630.4467387068. The cubic root of 21441037 is about 277.8104611795.

Adding to 21441037 its reverse (73014412), we get a palindrome (94455449).

The spelling of 21441037 in words is "twenty-one million, four hundred forty-one thousand, thirty-seven".