21324046 has 8 divisors (see below), whose sum is σ = 32050440. Its totient is φ = 10640568.

The previous prime is 21324031. The next prime is 21324047. The reversal of 21324046 is 64042312.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324047) 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, 9456 + ... + 11491.

It is an arithmetic number, because the mean of its divisors is an integer number (4006305).

Almost surely, 2^21324046 is an apocalyptic number.

21324046 is a deficient number, since it is larger than the sum of its proper divisors (10726394).

21324046 is a wasteful number, since it uses less digits than its factorization.

21324046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21458.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21324046 is about 4617.7966607463. The cubic root of 21324046 is about 277.3042571655.

Adding to 21324046 its reverse (64042312), we get a palindrome (85366358).

The spelling of 21324046 in words is "twenty-one million, three hundred twenty-four thousand, forty-six".