20288230 has 16 divisors (see below), whose sum is σ = 36595440. Its totient is φ = 8098272.

The previous prime is 20288207. The next prime is 20288237. The reversal of 20288230 is 3288202.

It is a super-3 number, since 3×20288230³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20288195 and 20288204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20288237) 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 7 ways as a sum of consecutive naturals, for example, 3616 + ... + 7324.

It is an arithmetic number, because the mean of its divisors is an integer number (2287215).

Almost surely, 2^20288230 is an apocalyptic number.

20288230 is a deficient number, since it is larger than the sum of its proper divisors (16307210).

20288230 is a wasteful number, since it uses less digits than its factorization.

20288230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20288230 is about 4504.2457748218. The cubic root of 20288230 is about 272.7395083063.

The spelling of 20288230 in words is "twenty million, two hundred eighty-eight thousand, two hundred thirty".