20555288 has 16 divisors (see below), whose sum is σ = 41506080. Its totient is φ = 9487008.

The previous prime is 20555251. The next prime is 20555299. The reversal of 20555288 is 88255502.

It is a congruent number.

It is an unprimeable number.

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, 98720 + ... + 98927.

It is an arithmetic number, because the mean of its divisors is an integer number (2594130).

Almost surely, 2^20555288 is an apocalyptic number.

It is an amenable number.

20555288 is an abundant number, since it is smaller than the sum of its proper divisors (20950792).

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

20555288 is a wasteful number, since it uses less digits than its factorization.

20555288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197666 (or 197662 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 20555288 is about 4533.7939962023. The cubic root of 20555288 is about 273.9310036372.

The spelling of 20555288 in words is "twenty million, five hundred fifty-five thousand, two hundred eighty-eight".