20355166 has 8 divisors (see below), whose sum is σ = 32881464. Its totient is φ = 9394680.

The previous prime is 20355157. The next prime is 20355191. The reversal of 20355166 is 66155302.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 391420 + ... + 391471.

It is an arithmetic number, because the mean of its divisors is an integer number (4110183).

Almost surely, 2^20355166 is an apocalyptic number.

20355166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20355166 is a deficient number, since it is larger than the sum of its proper divisors (12526298).

20355166 is a wasteful number, since it uses less digits than its factorization.

20355166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782906.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20355166 is about 4511.6699790654. The cubic root of 20355166 is about 273.0391245746.

The spelling of 20355166 in words is "twenty million, three hundred fifty-five thousand, one hundred sixty-six".