18249165 has 32 divisors (see below), whose sum is σ = 35395200. Its totient is φ = 8847360.

The previous prime is 18249137. The next prime is 18249167. The reversal of 18249165 is 56194281.

It is not a de Polignac number, because 18249165 - 2⁹ = 18248653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18249167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4660 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (1106100).

Almost surely, 2^18249165 is an apocalyptic number.

18249165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18249165 is a deficient number, since it is larger than the sum of its proper divisors (17146035).

18249165 is a wasteful number, since it uses less digits than its factorization.

18249165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12314 (or 12308 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 18249165 is about 4271.9041421830. The cubic root of 18249165 is about 263.2778559982.

Subtracting 18249165 from its reverse (56194281), we obtain a triangular number (37945116 = T₈₇₁₁).

The spelling of 18249165 in words is "eighteen million, two hundred forty-nine thousand, one hundred sixty-five".