20839844 has 12 divisors (see below), whose sum is σ = 36624000. Its totient is φ = 10375848.

The previous prime is 20839829. The next prime is 20839867. The reversal of 20839844 is 44893802.

It is a junction number, because it is equal to n+sod(n) for n = 20839798 and 20839807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9944 + ... + 11855.

It is an arithmetic number, because the mean of its divisors is an integer number (3052000).

Almost surely, 2^20839844 is an apocalyptic number.

It is an amenable number.

20839844 is a deficient number, since it is larger than the sum of its proper divisors (15784156).

20839844 is a wasteful number, since it uses less digits than its factorization.

20839844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22042 (or 22040 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 20839844 is about 4565.0677979631. The cubic root of 20839844 is about 275.1892647527.

The spelling of 20839844 in words is "twenty million, eight hundred thirty-nine thousand, eight hundred forty-four".