20330609 has 4 divisors (see below), whose sum is σ = 21894516. Its totient is φ = 18766704.

The previous prime is 20330591. The next prime is 20330647. The reversal of 20330609 is 90603302.

It is a happy number.

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 5276209 + 15054400 = 2297^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330609 - 2²⁰ = 19282033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20330309) 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, 781934 + ... + 781959.

It is an arithmetic number, because the mean of its divisors is an integer number (5473629).

Almost surely, 2^20330609 is an apocalyptic number.

It is an amenable number.

20330609 is a deficient number, since it is larger than the sum of its proper divisors (1563907).

20330609 is a wasteful number, since it uses less digits than its factorization.

20330609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563906.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 20330609 is about 4508.9476599313. The cubic root of 20330609 is about 272.9292798967.

The spelling of 20330609 in words is "twenty million, three hundred thirty thousand, six hundred nine".