18620166 has 16 divisors (see below), whose sum is σ = 37465344. Its totient is φ = 6169224.

The previous prime is 18620159. The next prime is 18620201. The reversal of 18620166 is 66102681.

It is a plaindrome in base 14.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 8290 + ... + 10293.

It is an arithmetic number, because the mean of its divisors is an integer number (2341584).

Almost surely, 2^18620166 is an apocalyptic number.

18620166 is an abundant number, since it is smaller than the sum of its proper divisors (18845178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18620166 is a wasteful number, since it uses less digits than its factorization.

18620166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18755.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18620166 is about 4315.1090368611. The cubic root of 18620166 is about 265.0500249692.

The spelling of 18620166 in words is "eighteen million, six hundred twenty thousand, one hundred sixty-six".