20007172 has 12 divisors (see below), whose sum is σ = 35058240. Its totient is φ = 9990536.

The previous prime is 20007167. The next prime is 20007173. The reversal of 20007172 is 27170002.

It is not an unprimeable number, because it can be changed into a prime (20007173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (2921520).

Almost surely, 2^20007172 is an apocalyptic number.

It is an amenable number.

20007172 is a deficient number, since it is larger than the sum of its proper divisors (15051068).

20007172 is a wasteful number, since it uses less digits than its factorization.

20007172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6528 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20007172 is about 4472.9377371030. The cubic root of 20007172 is about 271.4742041204.

Adding to 20007172 its reverse (27170002), we get a palindrome (47177174).

The spelling of 20007172 in words is "twenty million, seven thousand, one hundred seventy-two".