21441089 has 2 divisors, whose sum is σ = 21441090. Its totient is φ = 21441088.

The previous prime is 21441031. The next prime is 21441103. The reversal of 21441089 is 98014412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14592400 + 6848689 = 3820^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441089 - 2⁸ = 21440833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21441289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720544 + 10720545.

It is an arithmetic number, because the mean of its divisors is an integer number (10720545).

Almost surely, 2^21441089 is an apocalyptic number.

It is an amenable number.

21441089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441089 is an equidigital number, since it uses as much as digits as its factorization.

21441089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 21441089 is about 4630.4523537123. The cubic root of 21441089 is about 277.8106857665.

The spelling of 21441089 in words is "twenty-one million, four hundred forty-one thousand, eighty-nine".