20321204 has 6 divisors (see below), whose sum is σ = 35562114. Its totient is φ = 10160600.

The previous prime is 20321201. The next prime is 20321233. The reversal of 20321204 is 40212302.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 1416100 = 4348^2 + 1190^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2540147 + ... + 2540154.

It is an arithmetic number, because the mean of its divisors is an integer number (5927019).

Almost surely, 2^20321204 is an apocalyptic number.

It is an amenable number.

20321204 is a deficient number, since it is larger than the sum of its proper divisors (15240910).

20321204 is a wasteful number, since it uses less digits than its factorization.

20321204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080305 (or 5080303 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20321204 is about 4507.9046130104. The cubic root of 20321204 is about 272.8871874406.

Adding to 20321204 its reverse (40212302), we get a palindrome (60533506).

The spelling of 20321204 in words is "twenty million, three hundred twenty-one thousand, two hundred four".