20550288 has 40 divisors (see below), whose sum is σ = 57915936. Its totient is φ = 6227200.

The previous prime is 20550287. The next prime is 20550289. The reversal of 20550288 is 88205502.

It is an interprime number because it is at equal distance from previous prime (20550287) and next prime (20550289).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20550287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18933 + ... + 19988.

Almost surely, 2^20550288 is an apocalyptic number.

It is an amenable number.

20550288 is an abundant number, since it is smaller than the sum of its proper divisors (37365648).

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

20550288 is a wasteful number, since it uses less digits than its factorization.

20550288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38943 (or 38937 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 20550288 is about 4533.2425481106. The cubic root of 20550288 is about 273.9087909250.

The spelling of 20550288 in words is "twenty million, five hundred fifty thousand, two hundred eighty-eight".