20855324 has 12 divisors (see below), whose sum is σ = 41710704. Its totient is φ = 8937984.

The previous prime is 20855287. The next prime is 20855333. The reversal of 20855324 is 42355802.

20855324 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 372389 + ... + 372444.

It is an arithmetic number, because the mean of its divisors is an integer number (3475892).

Almost surely, 2^20855324 is an apocalyptic number.

It is an amenable number.

20855324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20855324 is a wasteful number, since it uses less digits than its factorization.

20855324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744844 (or 744842 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20855324 is about 4566.7629673544. The cubic root of 20855324 is about 275.2573854719.

The spelling of 20855324 in words is "twenty million, eight hundred fifty-five thousand, three hundred twenty-four".