21323332013 has 8 divisors (see below), whose sum is σ = 21691424160. Its totient is φ = 20955462640.

The previous prime is 21323332003. The next prime is 21323332021. The reversal of 21323332013 is 31023332312.

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 21323332013 - 2²² = 21319137709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21323332013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323332003) 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, 143483 + ... + 251463.

It is an arithmetic number, because the mean of its divisors is an integer number (2711428020).

Almost surely, 2^21323332013 is an apocalyptic number.

It is an amenable number.

21323332013 is a deficient number, since it is larger than the sum of its proper divisors (368092147).

21323332013 is a wasteful number, since it uses less digits than its factorization.

21323332013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111387.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21323332013 its reverse (31023332312), we get a palindrome (52346664325).

The spelling of 21323332013 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-two thousand, thirteen".