18145712 has 40 divisors (see below), whose sum is σ = 39518304. Its totient is φ = 8008704.

The previous prime is 18145711. The next prime is 18145759. The reversal of 18145712 is 21754181.

It is not an unprimeable number, because it can be changed into a prime (18145711) 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, 2888 + ... + 6680.

Almost surely, 2^18145712 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 18145712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19759152).

18145712 is an abundant number, since it is smaller than the sum of its proper divisors (21372592).

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

18145712 is a wasteful number, since it uses less digits than its factorization.

18145712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3831 counting only the distinct ones).

The product of its digits is 2240, while the sum is 29.

The square root of 18145712 is about 4259.7783979921. The cubic root of 18145712 is about 262.7794128344.

Adding to 18145712 its reverse (21754181), we get a palindrome (39899893).

The spelling of 18145712 in words is "eighteen million, one hundred forty-five thousand, seven hundred twelve".