18012512 has 48 divisors (see below), whose sum is σ = 40995360. Its totient is φ = 7630848.

The previous prime is 18012499. The next prime is 18012541. The reversal of 18012512 is 21521081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21314 + ... + 22142.

It is an arithmetic number, because the mean of its divisors is an integer number (854070).

Almost surely, 2^18012512 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 18012512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20497680).

18012512 is an abundant number, since it is smaller than the sum of its proper divisors (22982848).

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

18012512 is an equidigital number, since it uses as much as digits as its factorization.

18012512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 18012512 is about 4244.1149843047. The cubic root of 18012512 is about 262.1348489052.

Adding to 18012512 its reverse (21521081), we get a palindrome (39533593).

The spelling of 18012512 in words is "eighteen million, twelve thousand, five hundred twelve".