20318332 has 12 divisors (see below), whose sum is σ = 37648800. Its totient is φ = 9561536.

The previous prime is 20318303. The next prime is 20318339. The reversal of 20318332 is 23381302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20318339) 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 3 ways as a sum of consecutive naturals, for example, 149332 + ... + 149467.

It is an arithmetic number, because the mean of its divisors is an integer number (3137400).

Almost surely, 2^20318332 is an apocalyptic number.

It is an amenable number.

20318332 is a deficient number, since it is larger than the sum of its proper divisors (17330468).

20318332 is a wasteful number, since it uses less digits than its factorization.

20318332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298820 (or 298818 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20318332 is about 4507.5860502047. The cubic root of 20318332 is about 272.8743311006.

Adding to 20318332 its reverse (23381302), we get a palindrome (43699634).

The spelling of 20318332 in words is "twenty million, three hundred eighteen thousand, three hundred thirty-two".