20055277 has 4 divisors (see below), whose sum is σ = 21878496. Its totient is φ = 18232060.

The previous prime is 20055263. The next prime is 20055281. The reversal of 20055277 is 77255002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20055277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911593 + ... + 911614.

It is an arithmetic number, because the mean of its divisors is an integer number (5469624).

Almost surely, 2^20055277 is an apocalyptic number.

It is an amenable number.

20055277 is a deficient number, since it is larger than the sum of its proper divisors (1823219).

20055277 is a wasteful number, since it uses less digits than its factorization.

20055277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823218.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 20055277 is about 4478.3118471138. The cubic root of 20055277 is about 271.6916063939.

The spelling of 20055277 in words is "twenty million, fifty-five thousand, two hundred seventy-seven".