20550299 has 16 divisors (see below), whose sum is σ = 26507520. Its totient is φ = 15459360.

The previous prime is 20550289. The next prime is 20550301. The reversal of 20550299 is 99205502.

It is a de Polignac number, because none of the positive numbers 2^k-20550299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20550209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2369 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (1656720).

Almost surely, 2^20550299 is an apocalyptic number.

20550299 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20550299 is a deficient number, since it is larger than the sum of its proper divisors (5957221).

20550299 is a wasteful number, since it uses less digits than its factorization.

20550299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 20550299 is about 4533.2437613700. The cubic root of 20550299 is about 273.9088397969.

The spelling of 20550299 in words is "twenty million, five hundred fifty thousand, two hundred ninety-nine".