18541312 has 72 divisors (see below), whose sum is σ = 40029696. Its totient is φ = 8549376.

The previous prime is 18541309. The next prime is 18541319. The reversal of 18541312 is 21314581.

It is not an unprimeable number, because it can be changed into a prime (18541319) 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, 276703 + ... + 276769.

It is an arithmetic number, because the mean of its divisors is an integer number (555968).

Almost surely, 2^18541312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18541312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20014848).

18541312 is an abundant number, since it is smaller than the sum of its proper divisors (21488384).

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

18541312 is an equidigital number, since it uses as much as digits as its factorization.

18541312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 139 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 18541312 is about 4305.9623779127. The cubic root of 18541312 is about 264.6753446795.

Adding to 18541312 its reverse (21314581), we get a palindrome (39855893).

The spelling of 18541312 in words is "eighteen million, five hundred forty-one thousand, three hundred twelve".