20207166 has 16 divisors (see below), whose sum is σ = 46187904. Its totient is φ = 5773464.

The previous prime is 20207153. The next prime is 20207191. The reversal of 20207166 is 66170202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240520 + ... + 240603.

It is an arithmetic number, because the mean of its divisors is an integer number (2886744).

Almost surely, 2^20207166 is an apocalyptic number.

20207166 is an abundant number, since it is smaller than the sum of its proper divisors (25980738).

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

20207166 is a wasteful number, since it uses less digits than its factorization.

20207166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481135.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20207166 is about 4495.2381471953. The cubic root of 20207166 is about 272.3757692010.

Adding to 20207166 its reverse (66170202), we get a palindrome (86377368).

The spelling of 20207166 in words is "twenty million, two hundred seven thousand, one hundred sixty-six".