18529240 has 16 divisors (see below), whose sum is σ = 41690880. Its totient is φ = 7411680.

The previous prime is 18529223. The next prime is 18529241. The reversal of 18529240 is 4292581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18529241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231576 + ... + 231655.

It is an arithmetic number, because the mean of its divisors is an integer number (2605680).

Almost surely, 2^18529240 is an apocalyptic number.

18529240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18529240 is an abundant number, since it is smaller than the sum of its proper divisors (23161640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18529240 is a wasteful number, since it uses less digits than its factorization.

18529240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463242 (or 463238 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18529240 is about 4304.5603724422. The cubic root of 18529240 is about 264.6178900173.

It can be divided in two parts, 18529 and 240, that added together give a square (18769 = 137²).

The spelling of 18529240 in words is "eighteen million, five hundred twenty-nine thousand, two hundred forty".