20316172 has 24 divisors (see below), whose sum is σ = 36841392. Its totient is φ = 9796800.

The previous prime is 20316161. The next prime is 20316203. The reversal of 20316172 is 27161302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12147 + ... + 13717.

It is an arithmetic number, because the mean of its divisors is an integer number (1535058).

Almost surely, 2^20316172 is an apocalyptic number.

It is an amenable number.

20316172 is a deficient number, since it is larger than the sum of its proper divisors (16525220).

20316172 is a wasteful number, since it uses less digits than its factorization.

20316172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20316172 is about 4507.3464477451. The cubic root of 20316172 is about 272.8646611887.

Adding to 20316172 its reverse (27161302), we get a palindrome (47477474).

The spelling of 20316172 in words is "twenty million, three hundred sixteen thousand, one hundred seventy-two".