21334173 has 8 divisors (see below), whose sum is σ = 32509248. Its totient is φ = 12190944.

The previous prime is 21334171. The next prime is 21334189. The reversal of 21334173 is 37143312.

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

It is not a de Polignac number, because 21334173 - 2¹ = 21334171 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507936 + ... + 507977.

It is an arithmetic number, because the mean of its divisors is an integer number (4063656).

Almost surely, 2^21334173 is an apocalyptic number.

It is an amenable number.

21334173 is a deficient number, since it is larger than the sum of its proper divisors (11175075).

21334173 is a wasteful number, since it uses less digits than its factorization.

21334173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015923.

The product of its digits is 1512, while the sum is 24.

The square root of 21334173 is about 4618.8930492056. The cubic root of 21334173 is about 277.3481483947.

Adding to 21334173 its reverse (37143312), we get a palindrome (58477485).

The spelling of 21334173 in words is "twenty-one million, three hundred thirty-four thousand, one hundred seventy-three".