20317332 has 24 divisors (see below), whose sum is σ = 54179776. Its totient is φ = 5804928.

The previous prime is 20317279. The next prime is 20317337. The reversal of 20317332 is 23371302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20317299 and 20317308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20317337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120853 + ... + 121020.

Almost surely, 2^20317332 is an apocalyptic number.

It is an amenable number.

20317332 is an abundant number, since it is smaller than the sum of its proper divisors (33862444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20317332 is a wasteful number, since it uses less digits than its factorization.

20317332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241887 (or 241885 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20317332 is about 4507.4751247234. The cubic root of 20317332 is about 272.8698543747.

Adding to 20317332 its reverse (23371302), we get a palindrome (43688634).

The spelling of 20317332 in words is "twenty million, three hundred seventeen thousand, three hundred thirty-two".