18240075 has 72 divisors (see below), whose sum is σ = 38468768. Its totient is φ = 8087040.

The previous prime is 18240071. The next prime is 18240077. The reversal of 18240075 is 57004281.

It is not a de Polignac number, because 18240075 - 2² = 18240071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18240071) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 58119 + ... + 58431.

Almost surely, 2^18240075 is an apocalyptic number.

18240075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18240075 is an abundant number, since it is smaller than the sum of its proper divisors (20228693).

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

18240075 is a wasteful number, since it uses less digits than its factorization.

18240075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18240075 is about 4270.8400812955. The cubic root of 18240075 is about 263.2341354011.

The spelling of 18240075 in words is "eighteen million, two hundred forty thousand, seventy-five".