20530844 has 12 divisors (see below), whose sum is σ = 36204168. Its totient is φ = 10186800.

The previous prime is 20530841. The next prime is 20530871. The reversal of 20530844 is 44803502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19067 + ... + 20114.

It is an arithmetic number, because the mean of its divisors is an integer number (3017014).

Almost surely, 2^20530844 is an apocalyptic number.

It is an amenable number.

20530844 is a deficient number, since it is larger than the sum of its proper divisors (15673324).

20530844 is a wasteful number, since it uses less digits than its factorization.

20530844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39316 (or 39314 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20530844 is about 4531.0974388110. The cubic root of 20530844 is about 273.8223758646.

The spelling of 20530844 in words is "twenty million, five hundred thirty thousand, eight hundred forty-four".