20053 has 4 divisors (see below), whose sum is σ = 21888. Its totient is φ = 18220.

The previous prime is 20051. The next prime is 20063. The reversal of 20053 is 35002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20053 - 2¹ = 20051 is a prime.

It is a Duffinian number.

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 (20051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (5472).

2²⁰⁰⁵³ is an apocalyptic number.

It is an amenable number.

20053 is a deficient number, since it is larger than the sum of its proper divisors (1835).

20053 is a wasteful number, since it uses less digits than its factorization.

20053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834.

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 20053 is about 141.6086155571. The cubic root of 20053 is about 27.1681323727.

Adding to 20053 its reverse (35002), we get a palindrome (55055).

It can be divided in two parts, 200 and 53, that added together give a triangular number (253 = T₂₂).

The spelling of 20053 in words is "twenty thousand, fifty-three".