21144083 has 2 divisors, whose sum is σ = 21144084. Its totient is φ = 21144082.

The previous prime is 21144059. The next prime is 21144119. The reversal of 21144083 is 38044112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21144083 - 2¹⁴ = 21127699 is a prime.

It is not a weakly prime, because it can be changed into another prime (21144043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572041 + 10572042.

It is an arithmetic number, because the mean of its divisors is an integer number (10572042).

Almost surely, 2^21144083 is an apocalyptic number.

21144083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144083 is an equidigital number, since it uses as much as digits as its factorization.

21144083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 21144083 is about 4598.2695658258. The cubic root of 21144083 is about 276.5219547720.

Adding to 21144083 its reverse (38044112), we get a palindrome (59188195).

The spelling of 21144083 in words is "twenty-one million, one hundred forty-four thousand, eighty-three".