20030609 has 4 divisors (see below), whose sum is σ = 20062500. Its totient is φ = 19998720.

The previous prime is 20030599. The next prime is 20030627. The reversal of 20030609 is 90603002.

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 15840400 + 4190209 = 3980^2 + 2047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20030609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20030629) 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, 14984 + ... + 16265.

It is an arithmetic number, because the mean of its divisors is an integer number (5015625).

Almost surely, 2^20030609 is an apocalyptic number.

It is an amenable number.

20030609 is a deficient number, since it is larger than the sum of its proper divisors (31891).

20030609 is an equidigital number, since it uses as much as digits as its factorization.

20030609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31890.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20030609 is about 4475.5568368640. The cubic root of 20030609 is about 271.5801670907.

The spelling of 20030609 in words is "twenty million, thirty thousand, six hundred nine".