23821329 has 16 divisors (see below), whose sum is σ = 36495360. Its totient is φ = 13538640.

The previous prime is 23821319. The next prime is 23821331. The reversal of 23821329 is 92312832.

It is a happy number.

It is not a de Polignac number, because 23821329 - 2⁵ = 23821297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23821296 and 23821305.

It is not an unprimeable number, because it can be changed into a prime (23821319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042 + ... + 6980.

It is an arithmetic number, because the mean of its divisors is an integer number (2280960).

Almost surely, 2^23821329 is an apocalyptic number.

It is an amenable number.

23821329 is a deficient number, since it is larger than the sum of its proper divisors (12674031).

23821329 is a wasteful number, since it uses less digits than its factorization.

23821329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140.

The product of its digits is 5184, while the sum is 30.

The square root of 23821329 is about 4880.7098868915. The cubic root of 23821329 is about 287.7323299091.

The spelling of 23821329 in words is "twenty-three million, eight hundred twenty-one thousand, three hundred twenty-nine".