20303663809 has 16 divisors (see below), whose sum is σ = 24360779520. Its totient is φ = 16675522560.

The previous prime is 20303663801. The next prime is 20303663843. The reversal of 20303663809 is 90836630302.

It is a cyclic number.

It is not a de Polignac number, because 20303663809 - 2³ = 20303663801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20303663801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1503744 + ... + 1517185.

It is an arithmetic number, because the mean of its divisors is an integer number (1522548720).

Almost surely, 2^20303663809 is an apocalyptic number.

It is an amenable number.

20303663809 is a deficient number, since it is larger than the sum of its proper divisors (4057115711).

20303663809 is a wasteful number, since it uses less digits than its factorization.

20303663809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021000.

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 20303663809 in words is "twenty billion, three hundred three million, six hundred sixty-three thousand, eight hundred nine".