20182166 has 4 divisors (see below), whose sum is σ = 30273252. Its totient is φ = 10091082.

The previous prime is 20182163. The next prime is 20182219. The reversal of 20182166 is 66128102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20182163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045540 + ... + 5045543.

It is an arithmetic number, because the mean of its divisors is an integer number (7568313).

Almost surely, 2^20182166 is an apocalyptic number.

20182166 is a deficient number, since it is larger than the sum of its proper divisors (10091086).

20182166 is a wasteful number, since it uses less digits than its factorization.

20182166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091085.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20182166 is about 4492.4565662898. The cubic root of 20182166 is about 272.2633964530.

The spelling of 20182166 in words is "twenty million, one hundred eighty-two thousand, one hundred sixty-six".