20555466 has 16 divisors (see below), whose sum is σ = 41725344. Its totient is φ = 6749424.

The previous prime is 20555453. The next prime is 20555477. The reversal of 20555466 is 66455502.

It is a happy 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, 25165 + ... + 25968.

It is an arithmetic number, because the mean of its divisors is an integer number (2607834).

Almost surely, 2^20555466 is an apocalyptic number.

20555466 is an abundant number, since it is smaller than the sum of its proper divisors (21169878).

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

20555466 is a wasteful number, since it uses less digits than its factorization.

20555466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51205.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 20555466 is about 4533.8136265180. The cubic root of 20555466 is about 273.9317943433.

The spelling of 20555466 in words is "twenty million, five hundred fifty-five thousand, four hundred sixty-six".