20173066 has 32 divisors (see below), whose sum is σ = 32654160. Its totient is φ = 9331200.

The previous prime is 20173051. The next prime is 20173081. The reversal of 20173066 is 66037102.

It is an interprime number because it is at equal distance from previous prime (20173051) and next prime (20173081).

It can be written as a sum of positive squares in 8 ways, for example, as 5157441 + 15015625 = 2271^2 + 3875^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20173066.

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 in 15 ways as a sum of consecutive naturals, for example, 185020 + ... + 185128.

Almost surely, 2^20173066 is an apocalyptic number.

20173066 is a deficient number, since it is larger than the sum of its proper divisors (12481094).

20173066 is a wasteful number, since it uses less digits than its factorization.

20173066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20173066 is about 4491.4436431954. The cubic root of 20173066 is about 272.2224697362. Note that the first 3 decimals are identical.

The spelling of 20173066 in words is "twenty million, one hundred seventy-three thousand, sixty-six".