20036 has 6 divisors (see below), whose sum is σ = 35070. Its totient is φ = 10016.

The previous prime is 20029. The next prime is 20047. The reversal of 20036 is 63002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16900 + 3136 = 130^2 + 56^2 .

20036 is a modest number, since divided by 36 gives 20 as remainder.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 19999 and 20026.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501 + ... + 2508.

It is an arithmetic number, because the mean of its divisors is an integer number (5845).

2²⁰⁰³⁶ is an apocalyptic number.

It is an amenable number.

20036 is a deficient number, since it is larger than the sum of its proper divisors (15034).

20036 is a wasteful number, since it uses less digits than its factorization.

20036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013 (or 5011 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20036 is about 141.5485782338. The cubic root of 20036 is about 27.1604529095.

Adding to 20036 its reverse (63002), we get a palindrome (83038).

The spelling of 20036 in words is "twenty thousand, thirty-six".