18563125 has 20 divisors (see below), whose sum is σ = 26516512. Its totient is φ = 12726000.

The previous prime is 18563117. The next prime is 18563131. The reversal of 18563125 is 52136581.

It is not a de Polignac number, because 18563125 - 2³ = 18563117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2254 + ... + 6496.

Almost surely, 2^18563125 is an apocalyptic number.

It is an amenable number.

18563125 is a deficient number, since it is larger than the sum of its proper divisors (7953387).

18563125 is an frugal number, since it uses more digits than its factorization.

18563125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270 (or 4255 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 18563125 is about 4308.4945166496. The cubic root of 18563125 is about 264.7790967898.

The spelling of 18563125 in words is "eighteen million, five hundred sixty-three thousand, one hundred twenty-five".