20361 has 8 divisors (see below), whose sum is σ = 29664. Its totient is φ = 12320.

The previous prime is 20359. The next prime is 20369. The reversal of 20361 is 16302.

20361 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20361 - 2¹ = 20359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20369) 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, 276 + ... + 341.

It is an arithmetic number, because the mean of its divisors is an integer number (3708).

2²⁰³⁶¹ is an apocalyptic number.

It is an amenable number.

20361 is a deficient number, since it is larger than the sum of its proper divisors (9303).

20361 is a wasteful number, since it uses less digits than its factorization.

20361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20361 is about 142.6919759482. The cubic root of 20361 is about 27.3065207357.

Adding to 20361 its reverse (16302), we get a palindrome (36663).

The spelling of 20361 in words is "twenty thousand, three hundred sixty-one".