21134373 has 16 divisors (see below), whose sum is σ = 30717120. Its totient is φ = 12847104.

The previous prime is 21134369. The next prime is 21134387. The reversal of 21134373 is 37343112.

It is not a de Polignac number, because 21134373 - 2² = 21134369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134353) 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 15 ways as a sum of consecutive naturals, for example, 28 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (1919820).

Almost surely, 2^21134373 is an apocalyptic number.

It is an amenable number.

21134373 is a deficient number, since it is larger than the sum of its proper divisors (9582747).

21134373 is a wasteful number, since it uses less digits than its factorization.

21134373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628.

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

The square root of 21134373 is about 4597.2136126136. The cubic root of 21134373 is about 276.4796192196.

Adding to 21134373 its reverse (37343112), we get a palindrome (58477485).

The spelling of 21134373 in words is "twenty-one million, one hundred thirty-four thousand, three hundred seventy-three".