18115266 has 32 divisors (see below), whose sum is σ = 39207168. Its totient is φ = 5546880.

The previous prime is 18115261. The next prime is 18115277. The reversal of 18115266 is 66251181.

It is not an unprimeable number, because it can be changed into a prime (18115261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20710 + ... + 21566.

It is an arithmetic number, because the mean of its divisors is an integer number (1225224).

Almost surely, 2^18115266 is an apocalyptic number.

18115266 is an abundant number, since it is smaller than the sum of its proper divisors (21091902).

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

18115266 is a wasteful number, since it uses less digits than its factorization.

18115266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its digits is 2880, while the sum is 30.

The square root of 18115266 is about 4256.2032376286. The cubic root of 18115266 is about 262.6323613656.

It can be divided in two parts, 18115 and 266, that added together give a palindrome (18381).

The spelling of 18115266 in words is "eighteen million, one hundred fifteen thousand, two hundred sixty-six".