20168443 has 12 divisors (see below), whose sum is σ = 22558360. Its totient is φ = 17978112.

The previous prime is 20168429. The next prime is 20168459. The reversal of 20168443 is 34486102.

It is not a de Polignac number, because 20168443 - 2⁵ = 20168411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20168243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3655 + ... + 7327.

Almost surely, 2^20168443 is an apocalyptic number.

20168443 is a deficient number, since it is larger than the sum of its proper divisors (2389917).

20168443 is a wasteful number, since it uses less digits than its factorization.

20168443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726 (or 3709 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20168443 is about 4490.9289684875. The cubic root of 20168443 is about 272.2016733498.

It can be divided in two parts, 201 and 68443, that added together give a square (68644 = 262²).

The spelling of 20168443 in words is "twenty million, one hundred sixty-eight thousand, four hundred forty-three".