21305333342045 has 16 divisors (see below), whose sum is σ = 25737383024640. Its totient is φ = 16930292640000.

The previous prime is 21305333342023. The next prime is 21305333342063. The reversal of 21305333342045 is 54024333350312.

It is not a de Polignac number, because 21305333342045 - 2¹⁶ = 21305333276509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10833701 + ... + 12648309.

It is an arithmetic number, because the mean of its divisors is an integer number (1608586439040).

Almost surely, 2^{21305333342045} is an apocalyptic number.

It is an amenable number.

21305333342045 is a deficient number, since it is larger than the sum of its proper divisors (4432049682595).

21305333342045 is a wasteful number, since it uses less digits than its factorization.

21305333342045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830316.

The product of its (nonzero) digits is 388800, while the sum is 38.

Adding to 21305333342045 its reverse (54024333350312), we get a palindrome (75329666692357).

The spelling of 21305333342045 in words is "twenty-one trillion, three hundred five billion, three hundred thirty-three million, three hundred forty-two thousand, forty-five".