18630172 has 12 divisors (see below), whose sum is σ = 35566776. Its totient is φ = 8468240.

The previous prime is 18630169. The next prime is 18630217. The reversal of 18630172 is 27103681.

It is a self number, because there is not a number n which added to its sum of digits gives 18630172.

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, 211663 + ... + 211750.

It is an arithmetic number, because the mean of its divisors is an integer number (2963898).

Almost surely, 2^18630172 is an apocalyptic number.

It is an amenable number.

18630172 is a deficient number, since it is larger than the sum of its proper divisors (16936604).

18630172 is a wasteful number, since it uses less digits than its factorization.

18630172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423428 (or 423426 counting only the distinct ones).

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

The square root of 18630172 is about 4316.2682956461. The cubic root of 18630172 is about 265.0974934976.

The spelling of 18630172 in words is "eighteen million, six hundred thirty thousand, one hundred seventy-two".