20081658809 has 8 divisors (see below), whose sum is σ = 21163800000. Its totient is φ = 19002038832.

The previous prime is 20081658791. The next prime is 20081658811. The reversal of 20081658809 is 90885618002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20081658809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20081658829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613934 + ... + 645815.

It is an arithmetic number, because the mean of its divisors is an integer number (2645475000).

Almost surely, 2^20081658809 is an apocalyptic number.

It is an amenable number.

20081658809 is a deficient number, since it is larger than the sum of its proper divisors (1082141191).

20081658809 is a wasteful number, since it uses less digits than its factorization.

20081658809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260607.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 20081658809 in words is "twenty billion, eighty-one million, six hundred fifty-eight thousand, eight hundred nine".