20814172 has 12 divisors (see below), whose sum is σ = 38008656. Its totient is φ = 9954560.

The previous prime is 20814169. The next prime is 20814191. The reversal of 20814172 is 27141802.

It is a happy number.

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, 113029 + ... + 113212.

It is an arithmetic number, because the mean of its divisors is an integer number (3167388).

Almost surely, 2^20814172 is an apocalyptic number.

It is an amenable number.

20814172 is a deficient number, since it is larger than the sum of its proper divisors (17194484).

20814172 is a wasteful number, since it uses less digits than its factorization.

20814172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226268 (or 226266 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 20814172 is about 4562.2551441146. The cubic root of 20814172 is about 275.0762190935.

Adding to 20814172 its reverse (27141802), we get a palindrome (47955974).

The spelling of 20814172 in words is "twenty million, eight hundred fourteen thousand, one hundred seventy-two".