12021824 has 28 divisors (see below), whose sum is σ = 24896064. Its totient is φ = 5748864.

The previous prime is 12021817. The next prime is 12021857. The reversal of 12021824 is 42812021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12021796 and 12021805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2612 + ... + 5555.

Almost surely, 2^12021824 is an apocalyptic number.

It is an amenable number.

12021824 is an abundant number, since it is smaller than the sum of its proper divisors (12874240).

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

12021824 is an equidigital number, since it uses as much as digits as its factorization.

12021824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202 (or 8192 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 12021824 is about 3467.2502072968. The cubic root of 12021824 is about 229.0815547002.

Adding to 12021824 its reverse (42812021), we get a palindrome (54833845).

The spelling of 12021824 in words is "twelve million, twenty-one thousand, eight hundred twenty-four".