38021 has 4 divisors (see below), whose sum is σ = 38412. Its totient is φ = 37632.

The previous prime is 38011. The next prime is 38039. The reversal of 38021 is 12083.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12083 = 43 ⋅281.

It can be written as a sum of positive squares in 2 ways, for example, as 25921 + 12100 = 161^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 38021 - 2⁶ = 37957 is a prime.

It is a Duffinian number.

38021 is an undulating number in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 37987 and 38005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38011) 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, 95 + ... + 291.

It is an arithmetic number, because the mean of its divisors is an integer number (9603).

2³⁸⁰²¹ is an apocalyptic number.

It is an amenable number.

38021 is a deficient number, since it is larger than the sum of its proper divisors (391).

38021 is a wasteful number, since it uses less digits than its factorization.

38021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 38021 is about 194.9897433200. The cubic root of 38021 is about 33.6259460401.

Subtracting from 38021 its product of nonzero digits (48), we obtain a palindrome (37973).

The spelling of 38021 in words is "thirty-eight thousand, twenty-one".