20321332 has 6 divisors (see below), whose sum is σ = 35562338. Its totient is φ = 10160664.

The previous prime is 20321303. The next prime is 20321339. The reversal of 20321332 is 23312302.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 197136 = 4486^2 + 444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2540163 + ... + 2540170.

Almost surely, 2^20321332 is an apocalyptic number.

It is an amenable number.

20321332 is a deficient number, since it is larger than the sum of its proper divisors (15241006).

20321332 is a wasteful number, since it uses less digits than its factorization.

20321332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080337 (or 5080335 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20321332 is about 4507.9188102715. The cubic root of 20321332 is about 272.8877603970.

Adding to 20321332 its reverse (23312302), we get a palindrome (43633634).

It can be divided in two parts, 2032 and 1332, that added together give a square (3364 = 58²).

The spelling of 20321332 in words is "twenty million, three hundred twenty-one thousand, three hundred thirty-two".