21323030213 has 8 divisors (see below), whose sum is σ = 21490150176. Its totient is φ = 21155976400.

The previous prime is 21323030207. The next prime is 21323030219. The reversal of 21323030213 is 31203032312.

It is an interprime number because it is at equal distance from previous prime (21323030207) and next prime (21323030219).

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 21323030213 - 2⁶ = 21323030149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323030219) 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, 779498 + ... + 806388.

It is an arithmetic number, because the mean of its divisors is an integer number (2686268772).

Almost surely, 2^21323030213 is an apocalyptic number.

It is an amenable number.

21323030213 is a deficient number, since it is larger than the sum of its proper divisors (167119963).

21323030213 is a wasteful number, since it uses less digits than its factorization.

21323030213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33075.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21323030213 its reverse (31203032312), we get a palindrome (52526062525).

The spelling of 21323030213 in words is "twenty-one billion, three hundred twenty-three million, thirty thousand, two hundred thirteen".