18240893 has 8 divisors (see below), whose sum is σ = 20946720. Its totient is φ = 15709680.

The previous prime is 18240877. The next prime is 18240899. The reversal of 18240893 is 39804281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18240893 - 2⁴ = 18240877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43430 + ... + 43847.

It is an arithmetic number, because the mean of its divisors is an integer number (2618340).

Almost surely, 2^18240893 is an apocalyptic number.

It is an amenable number.

18240893 is a deficient number, since it is larger than the sum of its proper divisors (2705827).

18240893 is a wasteful number, since it uses less digits than its factorization.

18240893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87307.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18240893 is about 4270.9358459242. The cubic root of 18240893 is about 263.2380703685.

The spelling of 18240893 in words is "eighteen million, two hundred forty thousand, eight hundred ninety-three".