12051816 has 64 divisors (see below), whose sum is σ = 35942400. Its totient is φ = 3292608.

The previous prime is 12051811. The next prime is 12051841. The reversal of 12051816 is 61815021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051811) 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, 2305 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (561600).

Almost surely, 2^12051816 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 12051816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17971200).

12051816 is an abundant number, since it is smaller than the sum of its proper divisors (23890584).

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

12051816 is a wasteful number, since it uses less digits than its factorization.

12051816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158 (or 3154 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12051816 is about 3471.5725543333. The cubic root of 12051816 is about 229.2719004221.

Adding to 12051816 its reverse (61815021), we get a palindrome (73866837).

The spelling of 12051816 in words is "twelve million, fifty-one thousand, eight hundred sixteen".