18240714 has 40 divisors (see below), whose sum is σ = 41287620. Its totient is φ = 6018624.

The previous prime is 18240713. The next prime is 18240743. The reversal of 18240714 is 41704281.

It can be written as a sum of positive squares in 2 ways, for example, as 15468489 + 2772225 = 3933^2 + 1665^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18240713) 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 19 ways as a sum of consecutive naturals, for example, 17142 + ... + 18174.

Almost surely, 2^18240714 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18240714, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20643810).

18240714 is an abundant number, since it is smaller than the sum of its proper divisors (23046906).

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

18240714 is a wasteful number, since it uses less digits than its factorization.

18240714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18240714 is about 4270.9148902782. The cubic root of 18240714 is about 263.2372093038.

Adding to 18240714 its reverse (41704281), we get a palindrome (59944995).

The spelling of 18240714 in words is "eighteen million, two hundred forty thousand, seven hundred fourteen".