20585012 has 48 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 8400000.

The previous prime is 20584997. The next prime is 20585017. The reversal of 20585012 is 21058502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20585017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81887 + ... + 82137.

It is an arithmetic number, because the mean of its divisors is an integer number (899640).

Almost surely, 2^20585012 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 20585012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21591360).

20585012 is an abundant number, since it is smaller than the sum of its proper divisors (22597708).

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

20585012 is a wasteful number, since it uses less digits than its factorization.

20585012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20585012 is about 4537.0708612496. The cubic root of 20585012 is about 274.0629794668.

The spelling of 20585012 in words is "twenty million, five hundred eighty-five thousand, twelve".