20550189 has 16 divisors (see below), whose sum is σ = 30231360. Its totient is φ = 12312960.

The previous prime is 20550121. The next prime is 20550199. The reversal of 20550189 is 98105502.

It is not a de Polignac number, because 20550189 - 2⁸ = 20549933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562 + ... + 6435.

It is an arithmetic number, because the mean of its divisors is an integer number (1889460).

Almost surely, 2^20550189 is an apocalyptic number.

It is an amenable number.

20550189 is a deficient number, since it is larger than the sum of its proper divisors (9681171).

20550189 is a wasteful number, since it uses less digits than its factorization.

20550189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 20550189 is about 4533.2316287611. The cubic root of 20550189 is about 273.9083510770.

The spelling of 20550189 in words is "twenty million, five hundred fifty thousand, one hundred eighty-nine".