20852321 has 8 divisors (see below), whose sum is σ = 23859264. Its totient is φ = 17852400.

The previous prime is 20852317. The next prime is 20852323. The reversal of 20852321 is 12325802.

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 20852321 - 2² = 20852317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20852323) 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 7 ways as a sum of consecutive naturals, for example, 9131 + ... + 11183.

It is an arithmetic number, because the mean of its divisors is an integer number (2982408).

Almost surely, 2^20852321 is an apocalyptic number.

It is an amenable number.

20852321 is a deficient number, since it is larger than the sum of its proper divisors (3006943).

20852321 is a wasteful number, since it uses less digits than its factorization.

20852321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20852321 is about 4566.4341668308. The cubic root of 20852321 is about 275.2441732164.

The spelling of 20852321 in words is "twenty million, eight hundred fifty-two thousand, three hundred twenty-one".