20333216 has 12 divisors (see below), whose sum is σ = 40031082. Its totient is φ = 10166592.

The previous prime is 20333213. The next prime is 20333231. The reversal of 20333216 is 61233302.

It can be written as a sum of positive squares in only one way, i.e., 14592400 + 5740816 = 3820^2 + 2396^2 .

It is not an unprimeable number, because it can be changed into a prime (20333213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317675 + ... + 317738.

Almost surely, 2^20333216 is an apocalyptic number.

It is an amenable number.

20333216 is a deficient number, since it is larger than the sum of its proper divisors (19697866).

20333216 is an equidigital number, since it uses as much as digits as its factorization.

20333216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635423 (or 635415 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20333216 is about 4509.2367425098. The cubic root of 20333216 is about 272.9409453322.

Adding to 20333216 its reverse (61233302), we get a palindrome (81566518).

The spelling of 20333216 in words is "twenty million, three hundred thirty-three thousand, two hundred sixteen".