20824412 has 36 divisors (see below), whose sum is σ = 42699384. Its totient is φ = 8860320.

The previous prime is 20824403. The next prime is 20824417. The reversal of 20824412 is 21442802.

It is a happy number.

It is a super-2 number, since 2×20824412² = 867312270291488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35183 + ... + 35769.

It is an arithmetic number, because the mean of its divisors is an integer number (1186094).

Almost surely, 2^20824412 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 20824412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21349692).

20824412 is an abundant number, since it is smaller than the sum of its proper divisors (21874972).

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

20824412 is a wasteful number, since it uses less digits than its factorization.

20824412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20824412 is about 4563.3772581280. The cubic root of 20824412 is about 275.1213216753.

The spelling of 20824412 in words is "twenty million, eight hundred twenty-four thousand, four hundred twelve".