20325321 has 24 divisors (see below), whose sum is σ = 30635904. Its totient is φ = 12972960.

The previous prime is 20325311. The next prime is 20325337. The reversal of 20325321 is 12352302.

20325321 is a `hidden beast` number, since 20 + 325 + 321 = 666.

It is not a de Polignac number, because 20325321 - 2⁶ = 20325257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20325294 and 20325303.

It is not an unprimeable number, because it can be changed into a prime (20325301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21856 + ... + 22766.

It is an arithmetic number, because the mean of its divisors is an integer number (1276496).

Almost surely, 2^20325321 is an apocalyptic number.

It is an amenable number.

20325321 is a deficient number, since it is larger than the sum of its proper divisors (10310583).

20325321 is a wasteful number, since it uses less digits than its factorization.

20325321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20325321 is about 4508.3612321996. The cubic root of 20325321 is about 272.9056148378.

Adding to 20325321 its reverse (12352302), we get a palindrome (32677623).

The spelling of 20325321 in words is "twenty million, three hundred twenty-five thousand, three hundred twenty-one".