21324206 has 8 divisors (see below), whose sum is σ = 32021040. Its totient is φ = 10650528.

The previous prime is 21324203. The next prime is 21324221. The reversal of 21324206 is 60242312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324203) 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, 3266 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (4002630).

Almost surely, 2^21324206 is an apocalyptic number.

21324206 is a deficient number, since it is larger than the sum of its proper divisors (10696834).

21324206 is a wasteful number, since it uses less digits than its factorization.

21324206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11578.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21324206 is about 4617.8139849933. The cubic root of 21324206 is about 277.3049507263.

Adding to 21324206 its reverse (60242312), we get a palindrome (81566518).

The spelling of 21324206 in words is "twenty-one million, three hundred twenty-four thousand, two hundred six".