20228543 has 8 divisors (see below), whose sum is σ = 20593440. Its totient is φ = 19866880.

The previous prime is 20228501. The next prime is 20228561. The reversal of 20228543 is 34582202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20228543 - 2⁸ = 20228287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14183 + ... + 15543.

It is an arithmetic number, because the mean of its divisors is an integer number (2574180).

Almost surely, 2^20228543 is an apocalyptic number.

20228543 is a deficient number, since it is larger than the sum of its proper divisors (364897).

20228543 is a wasteful number, since it uses less digits than its factorization.

20228543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20228543 is about 4497.6152570001. The cubic root of 20228543 is about 272.4717834039.

The spelling of 20228543 in words is "twenty million, two hundred twenty-eight thousand, five hundred forty-three".