20235321 has 12 divisors (see below), whose sum is σ = 30948372. Its totient is φ = 12696576.

The previous prime is 20235269. The next prime is 20235329. The reversal of 20235321 is 12353202.

It can be written as a sum of positive squares in 2 ways, for example, as 17640000 + 2595321 = 4200^2 + 1611^2 .

It is not a de Polignac number, because 20235321 - 2¹⁴ = 20218937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20235294 and 20235303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20235329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65976 + ... + 66281.

It is an arithmetic number, because the mean of its divisors is an integer number (2579031).

Almost surely, 2^20235321 is an apocalyptic number.

It is an amenable number.

20235321 is a deficient number, since it is larger than the sum of its proper divisors (10713051).

20235321 is a wasteful number, since it uses less digits than its factorization.

20235321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132280 (or 132277 counting only the distinct ones).

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

The square root of 20235321 is about 4498.3687043194. The cubic root of 20235321 is about 272.5022124782.

Adding to 20235321 its reverse (12353202), we get a palindrome (32588523).

The spelling of 20235321 in words is "twenty million, two hundred thirty-five thousand, three hundred twenty-one".