21334 has 4 divisors (see below), whose sum is σ = 32004. Its totient is φ = 10666.

The previous prime is 21323. The next prime is 21341. The reversal of 21334 is 43312.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 14.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (8001).

2²¹³³⁴ is an apocalyptic number.

21334 is a deficient number, since it is larger than the sum of its proper divisors (10670).

21334 is a wasteful number, since it uses less digits than its factorization.

21334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10669.

The product of its digits is 72, while the sum is 13.

The square root of 21334 is about 146.0616308275. The cubic root of 21334 is about 27.7347398715.

Subtracting from 21334 its sum of digits (13), we obtain a triangular number (21321 = T₂₀₆).

Adding to 21334 its reverse (43312), we get a palindrome (64646).

The spelling of 21334 in words is "twenty-one thousand, three hundred thirty-four".