20168545 has 8 divisors (see below), whose sum is σ = 25626024. Its totient is φ = 15185664.

The previous prime is 20168527. The next prime is 20168573. The reversal of 20168545 is 54586102.

It can be written as a sum of positive squares in 4 ways, for example, as 667489 + 19501056 = 817^2 + 4416^2 .

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 20168545 - 2²¹ = 18071393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118554 + ... + 118723.

It is an arithmetic number, because the mean of its divisors is an integer number (3203253).

Almost surely, 2^20168545 is an apocalyptic number.

It is an amenable number.

20168545 is a deficient number, since it is larger than the sum of its proper divisors (5457479).

20168545 is a wasteful number, since it uses less digits than its factorization.

20168545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237299.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 20168545 is about 4490.9403246982. The cubic root of 20168545 is about 272.2021322271.

The spelling of 20168545 in words is "twenty million, one hundred sixty-eight thousand, five hundred forty-five".