20380316 has 12 divisors (see below), whose sum is σ = 38907960. Its totient is φ = 9263760.

The previous prime is 20380309. The next prime is 20380333. The reversal of 20380316 is 61308302.

It is a junction number, because it is equal to n+sod(n) for n = 20380291 and 20380300.

It is a congruent number.

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, 231551 + ... + 231638.

It is an arithmetic number, because the mean of its divisors is an integer number (3242330).

Almost surely, 2^20380316 is an apocalyptic number.

It is an amenable number.

20380316 is a deficient number, since it is larger than the sum of its proper divisors (18527644).

20380316 is a wasteful number, since it uses less digits than its factorization.

20380316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463204 (or 463202 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20380316 is about 4514.4563349312. The cubic root of 20380316 is about 273.1515302371.

Adding to 20380316 its reverse (61308302), we get a palindrome (81688618).

The spelling of 20380316 in words is "twenty million, three hundred eighty thousand, three hundred sixteen".