21323020213 has 8 divisors (see below), whose sum is σ = 23802441696. Its totient is φ = 18933759600.

The previous prime is 21323020189. The next prime is 21323020217. The reversal of 21323020213 is 31202032312.

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 21323020213 - 2⁵ = 21323020181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323020217) 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, 22539718 + ... + 22540663.

It is an arithmetic number, because the mean of its divisors is an integer number (2975305212).

Almost surely, 2^21323020213 is an apocalyptic number.

It is an amenable number.

21323020213 is a deficient number, since it is larger than the sum of its proper divisors (2479421483).

21323020213 is a wasteful number, since it uses less digits than its factorization.

21323020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45080435.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21323020213 its reverse (31202032312), we get a palindrome (52525052525).

The spelling of 21323020213 in words is "twenty-one billion, three hundred twenty-three million, twenty thousand, two hundred thirteen".