20563134 has 16 divisors (see below), whose sum is σ = 41193360. Its totient is φ = 6843200.

The previous prime is 20563133. The next prime is 20563139. The reversal of 20563134 is 43136502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20563133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1762 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (2574585).

Almost surely, 2^20563134 is an apocalyptic number.

20563134 is an abundant number, since it is smaller than the sum of its proper divisors (20630226).

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

20563134 is a wasteful number, since it uses less digits than its factorization.

20563134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5595.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20563134 is about 4534.6591933683. The cubic root of 20563134 is about 273.9658525652.

Adding to 20563134 its reverse (43136502), we get a palindrome (63699636).

The spelling of 20563134 in words is "twenty million, five hundred sixty-three thousand, one hundred thirty-four".