18140250 has 96 divisors (see below), whose sum is σ = 48499776. Its totient is φ = 4514400.

The previous prime is 18140219. The next prime is 18140267. The reversal of 18140250 is 5204181.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270717 + ... + 270783.

It is an arithmetic number, because the mean of its divisors is an integer number (505206).

Almost surely, 2^18140250 is an apocalyptic number.

18140250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18140250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24249888).

18140250 is an abundant number, since it is smaller than the sum of its proper divisors (30359526).

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

18140250 is a wasteful number, since it uses less digits than its factorization.

18140250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18140250 is about 4259.1372365774. The cubic root of 18140250 is about 262.7530439749.

The spelling of 18140250 in words is "eighteen million, one hundred forty thousand, two hundred fifty".