20809119707 has 8 divisors (see below), whose sum is σ = 20844246240. Its totient is φ = 20774022400.

The previous prime is 20809119701. The next prime is 20809119719. The reversal of 20809119707 is 70791190802.

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

It is a cyclic number.

It is not a de Polignac number, because 20809119707 - 2²² = 20804925403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20809119701) 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, 1760138 + ... + 1771920.

It is an arithmetic number, because the mean of its divisors is an integer number (2605530780).

Almost surely, 2^20809119707 is an apocalyptic number.

20809119707 is a deficient number, since it is larger than the sum of its proper divisors (35126533).

20809119707 is a wasteful number, since it uses less digits than its factorization.

20809119707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14613.

The product of its (nonzero) digits is 63504, while the sum is 44.

The spelling of 20809119707 in words is "twenty billion, eight hundred nine million, one hundred nineteen thousand, seven hundred seven".