20289544 has 16 divisors (see below), whose sum is σ = 41501520. Its totient is φ = 9222480.

The previous prime is 20289541. The next prime is 20289553. The reversal of 20289544 is 44598202.

It is not an unprimeable number, because it can be changed into a prime (20289541) 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, 115194 + ... + 115369.

It is an arithmetic number, because the mean of its divisors is an integer number (2593845).

Almost surely, 2^20289544 is an apocalyptic number.

It is an amenable number.

20289544 is an abundant number, since it is smaller than the sum of its proper divisors (21211976).

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

20289544 is a wasteful number, since it uses less digits than its factorization.

20289544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230580 (or 230576 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20289544 is about 4504.3916348382. The cubic root of 20289544 is about 272.7453963175.

The spelling of 20289544 in words is "twenty million, two hundred eighty-nine thousand, five hundred forty-four".