19224172 has 12 divisors (see below), whose sum is σ = 36700776. Its totient is φ = 8738240.

The previous prime is 19224167. The next prime is 19224193. The reversal of 19224172 is 27142291.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 19224172.

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, 218413 + ... + 218500.

It is an arithmetic number, because the mean of its divisors is an integer number (3058398).

Almost surely, 2^19224172 is an apocalyptic number.

It is an amenable number.

19224172 is a deficient number, since it is larger than the sum of its proper divisors (17476604).

19224172 is a wasteful number, since it uses less digits than its factorization.

19224172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436928 (or 436926 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 19224172 is about 4384.5378319727. The cubic root of 19224172 is about 267.8855046675.

The spelling of 19224172 in words is "nineteen million, two hundred twenty-four thousand, one hundred seventy-two".