21246326 has 4 divisors (see below), whose sum is σ = 31869492. Its totient is φ = 10623162.

The previous prime is 21246317. The next prime is 21246341. The reversal of 21246326 is 62364212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21246295 and 21246304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5311580 + ... + 5311583.

It is an arithmetic number, because the mean of its divisors is an integer number (7967373).

Almost surely, 2^21246326 is an apocalyptic number.

21246326 is a deficient number, since it is larger than the sum of its proper divisors (10623166).

21246326 is a wasteful number, since it uses less digits than its factorization.

21246326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10623165.

The product of its digits is 3456, while the sum is 26.

The square root of 21246326 is about 4609.3737101693. The cubic root of 21246326 is about 276.9669490122.

The spelling of 21246326 in words is "twenty-one million, two hundred forty-six thousand, three hundred twenty-six".