21166162 has 8 divisors (see below), whose sum is σ = 32132016. Its totient is φ = 10455492.

The previous prime is 21166157. The next prime is 21166163. The reversal of 21166162 is 26166112.

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

It is not an unprimeable number, because it can be changed into a prime (21166163) 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, 63588 + ... + 63919.

It is an arithmetic number, because the mean of its divisors is an integer number (4016502).

Almost surely, 2^21166162 is an apocalyptic number.

21166162 is a deficient number, since it is larger than the sum of its proper divisors (10965854).

21166162 is a wasteful number, since it uses less digits than its factorization.

21166162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127592.

The product of its digits is 864, while the sum is 25.

The square root of 21166162 is about 4600.6697338540. The cubic root of 21166162 is about 276.6181708841.

The spelling of 21166162 in words is "twenty-one million, one hundred sixty-six thousand, one hundred sixty-two".