18288325 has 24 divisors (see below), whose sum is σ = 25105536. Its totient is φ = 13104000.

The previous prime is 18288313. The next prime is 18288329. The reversal of 18288325 is 52388281.

It is not a de Polignac number, because 18288325 - 2⁵ = 18288293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18288329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19620 + ... + 20530.

It is an arithmetic number, because the mean of its divisors is an integer number (1046064).

Almost surely, 2^18288325 is an apocalyptic number.

It is an amenable number.

18288325 is a deficient number, since it is larger than the sum of its proper divisors (6817211).

18288325 is a wasteful number, since it uses less digits than its factorization.

18288325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 1000 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 18288325 is about 4276.4851221535. The cubic root of 18288325 is about 263.4660398607.

It can be divided in two parts, 1828 and 8325, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 18288325 in words is "eighteen million, two hundred eighty-eight thousand, three hundred twenty-five".