20563036 has 12 divisors (see below), whose sum is σ = 38753512. Its totient is φ = 9490608.

The previous prime is 20563027. The next prime is 20563069. The reversal of 20563036 is 63036502.

It is a self number, because there is not a number n which added to its sum of digits gives 20563036.

It is a congruent number.

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, 197670 + ... + 197773.

Almost surely, 2^20563036 is an apocalyptic number.

20563036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20563036 is a deficient number, since it is larger than the sum of its proper divisors (18190476).

20563036 is a wasteful number, since it uses less digits than its factorization.

20563036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395460 (or 395458 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 20563036 is about 4534.6483876923. The cubic root of 20563036 is about 273.9654173414.

Adding to 20563036 its reverse (63036502), we get a palindrome (83599538).

The spelling of 20563036 in words is "twenty million, five hundred sixty-three thousand, thirty-six".