18240115 has 8 divisors (see below), whose sum is σ = 21916080. Its totient is φ = 14573472.

The previous prime is 18240107. The next prime is 18240119. The reversal of 18240115 is 51104281.

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 18240115 - 2³ = 18240107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18240119) 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, 3156 + ... + 6814.

It is an arithmetic number, because the mean of its divisors is an integer number (2739510).

Almost surely, 2^18240115 is an apocalyptic number.

18240115 is a deficient number, since it is larger than the sum of its proper divisors (3675965).

18240115 is an equidigital number, since it uses as much as digits as its factorization.

18240115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4661.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 18240115 is about 4270.8447642123. The cubic root of 18240115 is about 263.2343278227.

Adding to 18240115 its reverse (51104281), we get a palindrome (69344396).

The spelling of 18240115 in words is "eighteen million, two hundred forty thousand, one hundred fifteen".