21300305326 has 4 divisors (see below), whose sum is σ = 31950457992. Its totient is φ = 10650152662.

The previous prime is 21300305287. The next prime is 21300305333. The reversal of 21300305326 is 62350300312.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21300305326.

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, 5325076330 + ... + 5325076333.

It is an arithmetic number, because the mean of its divisors is an integer number (7987614498).

Almost surely, 2^21300305326 is an apocalyptic number.

21300305326 is a deficient number, since it is larger than the sum of its proper divisors (10650152666).

21300305326 is a wasteful number, since it uses less digits than its factorization.

21300305326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650152665.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21300305326 its reverse (62350300312), we get a palindrome (83650605638).

The spelling of 21300305326 in words is "twenty-one billion, three hundred million, three hundred five thousand, three hundred twenty-six".