21467 has 2 divisors, whose sum is σ = 21468. Its totient is φ = 21466.

The previous prime is 21433. The next prime is 21481. The reversal of 21467 is 76412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21467 - 2⁸ = 21211 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21467.

It is not a weakly prime, because it can be changed into another prime (21407) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733 + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (10734).

2²¹⁴⁶⁷ is an apocalyptic number.

21467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467 is an equidigital number, since it uses as much as digits as its factorization.

21467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 20.

The square root of 21467 is about 146.5162107072. The cubic root of 21467 is about 27.7922549720.

Adding to 21467 its reverse (76412), we get a palindrome (97879).

Subtracting 21467 from its reverse (76412), we obtain a palindrome (54945).

The spelling of 21467 in words is "twenty-one thousand, four hundred sixty-seven".