23213320021 has 8 divisors (see below), whose sum is σ = 24945658560. Its totient is φ = 21521742528.

The previous prime is 23213320007. The next prime is 23213320049. The reversal of 23213320021 is 12002331232.

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 23213320021 - 2²³ = 23204931413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213320121) 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, 10189081 + ... + 10191358.

It is an arithmetic number, because the mean of its divisors is an integer number (3118207320).

Almost surely, 2^23213320021 is an apocalyptic number.

It is an amenable number.

23213320021 is a deficient number, since it is larger than the sum of its proper divisors (1732338539).

23213320021 is a wasteful number, since it uses less digits than its factorization.

23213320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20380523.

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

Adding to 23213320021 its reverse (12002331232), we get a palindrome (35215651253).

The spelling of 23213320021 in words is "twenty-three billion, two hundred thirteen million, three hundred twenty thousand, twenty-one".