20824216 has 32 divisors (see below), whose sum is σ = 45540000. Its totient is φ = 8923488.

The previous prime is 20824213. The next prime is 20824253. The reversal of 20824216 is 61242802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (1423125).

Almost surely, 2^20824216 is an apocalyptic number.

It is an amenable number.

20824216 is an abundant number, since it is smaller than the sum of its proper divisors (24715784).

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

20824216 is an equidigital number, since it uses as much as digits as its factorization.

20824216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616 (or 7598 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20824216 is about 4563.3557827546. The cubic root of 20824216 is about 275.1204585225.

The spelling of 20824216 in words is "twenty million, eight hundred twenty-four thousand, two hundred sixteen".