20041689 has 4 divisors (see below), whose sum is σ = 26722256. Its totient is φ = 13361124.

The previous prime is 20041687. The next prime is 20041709. The reversal of 20041689 is 98614002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20041689 - 2¹ = 20041687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20041687) 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, 3340279 + ... + 3340284.

It is an arithmetic number, because the mean of its divisors is an integer number (6680564).

Almost surely, 2^20041689 is an apocalyptic number.

It is an amenable number.

20041689 is a deficient number, since it is larger than the sum of its proper divisors (6680567).

20041689 is an equidigital number, since it uses as much as digits as its factorization.

20041689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680566.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20041689 is about 4476.7945005327. The cubic root of 20041689 is about 271.6302330271.

The spelling of 20041689 in words is "twenty million, forty-one thousand, six hundred eighty-nine".