20315332 has 12 divisors (see below), whose sum is σ = 37423120. Its totient is φ = 9623016.

The previous prime is 20315303. The next prime is 20315359. The reversal of 20315332 is 23351302.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133578 + ... + 133729.

Almost surely, 2^20315332 is an apocalyptic number.

It is an amenable number.

20315332 is a deficient number, since it is larger than the sum of its proper divisors (17107788).

20315332 is a wasteful number, since it uses less digits than its factorization.

20315332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267330 (or 267328 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 20315332 is about 4507.2532655710. The cubic root of 20315332 is about 272.8609004823.

Adding to 20315332 its reverse (23351302), we get a palindrome (43666634).

The spelling of 20315332 in words is "twenty million, three hundred fifteen thousand, three hundred thirty-two".