20285600 has 36 divisors (see below), whose sum is σ = 49524174. Its totient is φ = 8113920.

The previous prime is 20285599. The next prime is 20285621. The reversal of 20285600 is 658202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13337104 + 6948496 = 3652^2 + 2636^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11879 + ... + 13478.

Almost surely, 2^20285600 is an apocalyptic number.

20285600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20285600 is an abundant number, since it is smaller than the sum of its proper divisors (29238574).

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

20285600 is a wasteful number, since it uses less digits than its factorization.

20285600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25377 (or 25364 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20285600 is about 4503.9538185909. The cubic root of 20285600 is about 272.7277225582.

The spelling of 20285600 in words is "twenty million, two hundred eighty-five thousand, six hundred".