21365326 has 4 divisors (see below), whose sum is σ = 32047992. Its totient is φ = 10682662.

The previous prime is 21365303. The next prime is 21365347. The reversal of 21365326 is 62356312.

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 = 21365294 and 21365303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5341330 + ... + 5341333.

It is an arithmetic number, because the mean of its divisors is an integer number (8011998).

Almost surely, 2^21365326 is an apocalyptic number.

21365326 is a deficient number, since it is larger than the sum of its proper divisors (10682666).

21365326 is a wasteful number, since it uses less digits than its factorization.

21365326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682665.

The product of its digits is 6480, while the sum is 28.

The square root of 21365326 is about 4622.2641638054. The cubic root of 21365326 is about 277.4830809694.

The spelling of 21365326 in words is "twenty-one million, three hundred sixty-five thousand, three hundred twenty-six".