21441383 has 2 divisors, whose sum is σ = 21441384. Its totient is φ = 21441382.

The previous prime is 21441377. The next prime is 21441421. The reversal of 21441383 is 38314412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21441383 - 2¹⁶ = 21375847 is a prime.

It is a Sophie Germain prime.

It is equal to p_1356092 and since 21441383 and 1356092 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21441323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720691 + 10720692.

It is an arithmetic number, because the mean of its divisors is an integer number (10720692).

Almost surely, 2^21441383 is an apocalyptic number.

21441383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441383 is an equidigital number, since it uses as much as digits as its factorization.

21441383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 21441383 is about 4630.4840999619. The cubic root of 21441383 is about 277.8119555398.

Adding to 21441383 its reverse (38314412), we get a palindrome (59755795).

The spelling of 21441383 in words is "twenty-one million, four hundred forty-one thousand, three hundred eighty-three".