20489288 has 16 divisors (see below), whose sum is σ = 38677500. Its totient is φ = 10175296.

The previous prime is 20489281. The next prime is 20489303. The reversal of 20489288 is 88298402.

It can be written as a sum of positive squares in 2 ways, for example, as 20448484 + 40804 = 4522^2 + 202^2 .

It is not an unprimeable number, because it can be changed into a prime (20489281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7403 + ... + 9786.

Almost surely, 2^20489288 is an apocalyptic number.

It is an amenable number.

20489288 is a deficient number, since it is larger than the sum of its proper divisors (18188212).

20489288 is a wasteful number, since it uses less digits than its factorization.

20489288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344 (or 17340 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 20489288 is about 4526.5094719883. The cubic root of 20489288 is about 273.6375052606.

The spelling of 20489288 in words is "twenty million, four hundred eighty-nine thousand, two hundred eighty-eight".