36021 has 4 divisors (see below), whose sum is σ = 48032. Its totient is φ = 24012.

The previous prime is 36017. The next prime is 36037. The reversal of 36021 is 12063.

36021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12063 = 3 ⋅4021.

It is not a de Polignac number, because 36021 - 2² = 36017 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 35988 and 36006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36011) 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, 6001 + ... + 6006.

It is an arithmetic number, because the mean of its divisors is an integer number (12008).

2³⁶⁰²¹ is an apocalyptic number.

It is an amenable number.

36021 is a deficient number, since it is larger than the sum of its proper divisors (12011).

36021 is a wasteful number, since it uses less digits than its factorization.

36021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12010.

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

The square root of 36021 is about 189.7919914011. The cubic root of 36021 is about 33.0256916550.

Adding to 36021 its reverse (12063), we get a palindrome (48084).

The spelling of 36021 in words is "thirty-six thousand, twenty-one".