21474166 has 16 divisors (see below), whose sum is σ = 36874656. Its totient is φ = 9187776.

The previous prime is 21474143. The next prime is 21474217. The reversal of 21474166 is 66147412.

It is a super-2 number, since 2×21474166² = 922279610791112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12300 + ... + 13936.

It is an arithmetic number, because the mean of its divisors is an integer number (2304666).

Almost surely, 2^21474166 is an apocalyptic number.

21474166 is a deficient number, since it is larger than the sum of its proper divisors (15400490).

21474166 is a wasteful number, since it uses less digits than its factorization.

21474166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its digits is 8064, while the sum is 31.

The square root of 21474166 is about 4634.0226585549. The cubic root of 21474166 is about 277.9534711564.

The spelling of 21474166 in words is "twenty-one million, four hundred seventy-four thousand, one hundred sixty-six".