20264 has 16 divisors (see below), whose sum is σ = 40500. Its totient is φ = 9472.

The previous prime is 20261. The next prime is 20269. The reversal of 20264 is 46202.

It can be written as a sum of positive squares in 2 ways, for example, as 20164 + 100 = 142^2 + 10^2 .

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62 + ... + 210.

2²⁰²⁶⁴ is an apocalyptic number.

It is an amenable number.

20264 is a deficient number, since it is larger than the sum of its proper divisors (20236).

20264 is a wasteful number, since it uses less digits than its factorization.

20264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20264 is about 142.3516771942. The cubic root of 20264 is about 27.2630888500.

Adding to 20264 its reverse (46202), we get a palindrome (66466).

The spelling of 20264 in words is "twenty thousand, two hundred sixty-four".