20036903609 has 4 divisors (see below), whose sum is σ = 20102170704. Its totient is φ = 19971636516.

The previous prime is 20036903531. The next prime is 20036903617. The reversal of 20036903609 is 90630963002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20036903609 - 2²⁰ = 20035855033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20036903699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32633087 + ... + 32633700.

It is an arithmetic number, because the mean of its divisors is an integer number (5025542676).

Almost surely, 2^20036903609 is an apocalyptic number.

It is an amenable number.

20036903609 is a deficient number, since it is larger than the sum of its proper divisors (65267095).

20036903609 is an equidigital number, since it uses as much as digits as its factorization.

20036903609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65267094.

The product of its (nonzero) digits is 52488, while the sum is 38.

The spelling of 20036903609 in words is "twenty billion, thirty-six million, nine hundred three thousand, six hundred nine".