21704334 has 32 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 6966720.

The previous prime is 21704323. The next prime is 21704351. The reversal of 21704334 is 43340712.

It is a super-2 number, since 2×21704334² = 942156228767112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19887 + ... + 20949.

It is an arithmetic number, because the mean of its divisors is an integer number (1407672).

Almost surely, 2^21704334 is an apocalyptic number.

21704334 is an abundant number, since it is smaller than the sum of its proper divisors (23341170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21704334 is a wasteful number, since it uses less digits than its factorization.

21704334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 21704334 is about 4658.7910448957. The cubic root of 21704334 is about 278.9430132451.

The spelling of 21704334 in words is "twenty-one million, seven hundred four thousand, three hundred thirty-four".