20563012 has 24 divisors (see below), whose sum is σ = 37711296. Its totient is φ = 9792288.

The previous prime is 20563007. The next prime is 20563021. The reversal of 20563012 is 21036502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36243 + ... + 36805.

It is an arithmetic number, because the mean of its divisors is an integer number (1571304).

Almost surely, 2^20563012 is an apocalyptic number.

It is an amenable number.

20563012 is a deficient number, since it is larger than the sum of its proper divisors (17148284).

20563012 is a wasteful number, since it uses less digits than its factorization.

20563012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20563012 is about 4534.6457414003. The cubic root of 20563012 is about 273.9653107557.

Adding to 20563012 its reverse (21036502), we get a palindrome (41599514).

The spelling of 20563012 in words is "twenty million, five hundred sixty-three thousand, twelve".