20884724 has 48 divisors (see below), whose sum is σ = 45198720. Its totient is φ = 8242560.

The previous prime is 20884711. The next prime is 20884739. The reversal of 20884724 is 42748802.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19154 + ... + 20214.

It is an arithmetic number, because the mean of its divisors is an integer number (941640).

Almost surely, 2^20884724 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 20884724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22599360).

20884724 is an abundant number, since it is smaller than the sum of its proper divisors (24313996).

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

20884724 is a wasteful number, since it uses less digits than its factorization.

20884724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 20884724 is about 4569.9807439419. The cubic root of 20884724 is about 275.3866692842.

The spelling of 20884724 in words is "twenty million, eight hundred eighty-four thousand, seven hundred twenty-four".