21344134 has 16 divisors (see below), whose sum is σ = 36748800. Its totient is φ = 9107784.

The previous prime is 21344131. The next prime is 21344159. The reversal of 21344134 is 43144312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157 + ... + 6535.

It is an arithmetic number, because the mean of its divisors is an integer number (2296800).

Almost surely, 2^21344134 is an apocalyptic number.

21344134 is a deficient number, since it is larger than the sum of its proper divisors (15404666).

21344134 is a wasteful number, since it uses less digits than its factorization.

21344134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627.

The product of its digits is 1152, while the sum is 22.

The square root of 21344134 is about 4619.9712120315. The cubic root of 21344134 is about 277.3913066187.

Adding to 21344134 its reverse (43144312), we get a palindrome (64488446).

The spelling of 21344134 in words is "twenty-one million, three hundred forty-four thousand, one hundred thirty-four".