20288273 has 2 divisors, whose sum is σ = 20288274. Its totient is φ = 20288272.

The previous prime is 20288251. The next prime is 20288297. The reversal of 20288273 is 37288202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17073424 + 3214849 = 4132^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 20288273 - 2⁸ = 20288017 is a prime.

It is a super-2 number, since 2×20288273² = 823228042645058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20288473) 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 as a sum of consecutive naturals, namely, 10144136 + 10144137.

It is an arithmetic number, because the mean of its divisors is an integer number (10144137).

Almost surely, 2^20288273 is an apocalyptic number.

It is an amenable number.

20288273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20288273 is an equidigital number, since it uses as much as digits as its factorization.

20288273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20288273 is about 4504.2505480934. The cubic root of 20288273 is about 272.7397009926.

It can be divided in two parts, 2028 and 8273, that added together give a palindrome (10301).

The spelling of 20288273 in words is "twenty million, two hundred eighty-eight thousand, two hundred seventy-three".