20844916 has 6 divisors (see below), whose sum is σ = 36478610. Its totient is φ = 10422456.

The previous prime is 20844883. The next prime is 20844937. The reversal of 20844916 is 61944802.

It can be written as a sum of positive squares in only one way, i.e., 16434916 + 4410000 = 4054^2 + 2100^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605611 + ... + 2605618.

Almost surely, 2^20844916 is an apocalyptic number.

It is an amenable number.

20844916 is a deficient number, since it is larger than the sum of its proper divisors (15633694).

20844916 is a wasteful number, since it uses less digits than its factorization.

20844916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211233 (or 5211231 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20844916 is about 4565.6232871318. The cubic root of 20844916 is about 275.2115881241.

The spelling of 20844916 in words is "twenty million, eight hundred forty-four thousand, nine hundred sixteen".