20005536 has 24 divisors (see below), whose sum is σ = 52514784. Its totient is φ = 6668480.

The previous prime is 20005529. The next prime is 20005541. The reversal of 20005536 is 63550002.

It is a tau number, because it is divible by the number of its divisors (24).

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, 104100 + ... + 104291.

It is an arithmetic number, because the mean of its divisors is an integer number (2188116).

Almost surely, 2^20005536 is an apocalyptic number.

It is an amenable number.

20005536 is an abundant number, since it is smaller than the sum of its proper divisors (32509248).

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

20005536 is a wasteful number, since it uses less digits than its factorization.

20005536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208404 (or 208396 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20005536 is about 4472.7548557908. The cubic root of 20005536 is about 271.4668043756.

Adding to 20005536 its reverse (63550002), we get a palindrome (83555538).

The spelling of 20005536 in words is "twenty million, five thousand, five hundred thirty-six".