21041168 has 10 divisors (see below), whose sum is σ = 40767294. Its totient is φ = 10520576.

The previous prime is 21041117. The next prime is 21041191. The reversal of 21041168 is 86114012.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 719104 = 4508^2 + 848^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657521 + ... + 657552.

Almost surely, 2^21041168 is an apocalyptic number.

It is an amenable number.

21041168 is a deficient number, since it is larger than the sum of its proper divisors (19726126).

21041168 is a wasteful number, since it uses less digits than its factorization.

21041168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315081 (or 1315075 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 21041168 is about 4587.0652927553. The cubic root of 21041168 is about 276.0725847041.

The spelling of 21041168 in words is "twenty-one million, forty-one thousand, one hundred sixty-eight".