21323255645611 has 8 divisors (see below), whose sum is σ = 21819981835520. Its totient is φ = 20826567479592.

The previous prime is 21323255645563. The next prime is 21323255645623. The reversal of 21323255645611 is 11654655232312.

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

It is a cyclic number.

It is not a de Polignac number, because 21323255645611 - 2⁹ = 21323255645099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323255645311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8369775 + ... + 10616008.

It is an arithmetic number, because the mean of its divisors is an integer number (2727497729440).

Almost surely, 2^{21323255645611} is an apocalyptic number.

21323255645611 is a deficient number, since it is larger than the sum of its proper divisors (496726189909).

21323255645611 is a wasteful number, since it uses less digits than its factorization.

21323255645611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19011945.

The product of its digits is 1296000, while the sum is 46.

The spelling of 21323255645611 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred fifty-five million, six hundred forty-five thousand, six hundred eleven".