21048166 has 8 divisors (see below), whose sum is σ = 31672800. Its totient is φ = 10490568.

The previous prime is 21048161. The next prime is 21048173. The reversal of 21048166 is 66184012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048161) 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 3 ways as a sum of consecutive naturals, for example, 15966 + ... + 17233.

It is an arithmetic number, because the mean of its divisors is an integer number (3959100).

Almost surely, 2^21048166 is an apocalyptic number.

21048166 is a deficient number, since it is larger than the sum of its proper divisors (10624634).

21048166 is a wasteful number, since it uses less digits than its factorization.

21048166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33518.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 21048166 is about 4587.8280264195. The cubic root of 21048166 is about 276.1031872798.

The spelling of 21048166 in words is "twenty-one million, forty-eight thousand, one hundred sixty-six".