20140009 has 4 divisors (see below), whose sum is σ = 20171140. Its totient is φ = 20108880.

The previous prime is 20139997. The next prime is 20140027. The reversal of 20140009 is 90004102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 6744409 = 3660^2 + 2597^2 .

It is a cyclic number.

It is not a de Polignac number, because 20140009 - 2¹¹ = 20137961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20139974 and 20140001.

It is not an unprimeable number, because it can be changed into a prime (20140069) 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, 14574 + ... + 15895.

It is an arithmetic number, because the mean of its divisors is an integer number (5042785).

Almost surely, 2^20140009 is an apocalyptic number.

It is an amenable number.

20140009 is a deficient number, since it is larger than the sum of its proper divisors (31131).

20140009 is an equidigital number, since it uses as much as digits as its factorization.

20140009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31130.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20140009 is about 4487.7621371904. The cubic root of 20140009 is about 272.0736941683.

The spelling of 20140009 in words is "twenty million, one hundred forty thousand, nine".