21466063 has 4 divisors (see below), whose sum is σ = 21786520. Its totient is φ = 21145608.

The previous prime is 21466037. The next prime is 21466079. The reversal of 21466063 is 36066412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21466063 - 2¹³ = 21457871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160128 + ... + 160261.

It is an arithmetic number, because the mean of its divisors is an integer number (5446630).

Almost surely, 2^21466063 is an apocalyptic number.

21466063 is a deficient number, since it is larger than the sum of its proper divisors (320457).

21466063 is an equidigital number, since it uses as much as digits as its factorization.

21466063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320456.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 21466063 is about 4633.1482816763. The cubic root of 21466063 is about 277.9185060372.

The spelling of 21466063 in words is "twenty-one million, four hundred sixty-six thousand, sixty-three".