20075609 has 8 divisors (see below), whose sum is σ = 21648480. Its totient is φ = 18554400.

The previous prime is 20075603. The next prime is 20075611. The reversal of 20075609 is 90657002.

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 20075609 - 2⁴ = 20075593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20075603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12107 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (2706060).

Almost surely, 2^20075609 is an apocalyptic number.

It is an amenable number.

20075609 is a deficient number, since it is larger than the sum of its proper divisors (1572871).

20075609 is a wasteful number, since it uses less digits than its factorization.

20075609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25831.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20075609 is about 4480.5813238909. The cubic root of 20075609 is about 271.7833888549.

The spelling of 20075609 in words is "twenty million, seventy-five thousand, six hundred nine".