20307316 has 24 divisors (see below), whose sum is σ = 37993536. Its totient is φ = 9463680.

The previous prime is 20307307. The next prime is 20307317. The reversal of 20307316 is 61370302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20307317) 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, 5881 + ... + 8671.

It is an arithmetic number, because the mean of its divisors is an integer number (1583064).

Almost surely, 2^20307316 is an apocalyptic number.

It is an amenable number.

20307316 is a deficient number, since it is larger than the sum of its proper divisors (17686220).

20307316 is a wasteful number, since it uses less digits than its factorization.

20307316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919 (or 2917 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 20307316 is about 4506.3639444679. The cubic root of 20307316 is about 272.8250073824.

Adding to 20307316 its reverse (61370302), we get a palindrome (81677618).

The spelling of 20307316 in words is "twenty million, three hundred seven thousand, three hundred sixteen".