21734168 has 8 divisors (see below), whose sum is σ = 40751580. Its totient is φ = 10867080.

The previous prime is 21734147. The next prime is 21734171. The reversal of 21734168 is 86143712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1358378 + ... + 1358393.

Almost surely, 2^21734168 is an apocalyptic number.

It is an amenable number.

21734168 is a deficient number, since it is larger than the sum of its proper divisors (19017412).

21734168 is a wasteful number, since it uses less digits than its factorization.

21734168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716777 (or 2716773 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 21734168 is about 4661.9918489847. The cubic root of 21734168 is about 279.0707630873.

The spelling of 21734168 in words is "twenty-one million, seven hundred thirty-four thousand, one hundred sixty-eight".