20055172 has 24 divisors (see below), whose sum is σ = 38779776. Its totient is φ = 9026688.

The previous prime is 20055143. The next prime is 20055173. The reversal of 20055172 is 27155002.

It is not an unprimeable number, because it can be changed into a prime (20055173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4848 + ... + 7975.

It is an arithmetic number, because the mean of its divisors is an integer number (1615824).

Almost surely, 2^20055172 is an apocalyptic number.

It is an amenable number.

20055172 is a deficient number, since it is larger than the sum of its proper divisors (18724604).

20055172 is a wasteful number, since it uses less digits than its factorization.

20055172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12867 (or 12865 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20055172 is about 4478.3001239310. The cubic root of 20055172 is about 271.6911322432.

The spelling of 20055172 in words is "twenty million, fifty-five thousand, one hundred seventy-two".