20483609 has 4 divisors (see below), whose sum is σ = 20960016. Its totient is φ = 20007204.

The previous prime is 20483597. The next prime is 20483621. The reversal of 20483609 is 90638402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90638402 = 2 ⋅45319201.

It is an interprime number because it is at equal distance from previous prime (20483597) and next prime (20483621).

It is a cyclic number.

It is not a de Polignac number, because 20483609 - 2²⁴ = 3706393 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 (20483689) 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 3 ways as a sum of consecutive naturals, for example, 238139 + ... + 238224.

It is an arithmetic number, because the mean of its divisors is an integer number (5240004).

Almost surely, 2^20483609 is an apocalyptic number.

It is an amenable number.

20483609 is a deficient number, since it is larger than the sum of its proper divisors (476407).

20483609 is an equidigital number, since it uses as much as digits as its factorization.

20483609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476406.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20483609 is about 4525.8821239621. The cubic root of 20483609 is about 273.6122216264.

The spelling of 20483609 in words is "twenty million, four hundred eighty-three thousand, six hundred nine".