20822586909 has 4 divisors (see below), whose sum is σ = 27763449216. Its totient is φ = 13881724604.

The previous prime is 20822586899. The next prime is 20822586937. The reversal of 20822586909 is 90968522802.

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 20822586909 - 2²⁰ = 20821538333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20822586949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3470431149 + ... + 3470431154.

It is an arithmetic number, because the mean of its divisors is an integer number (6940862304).

Almost surely, 2^20822586909 is an apocalyptic number.

It is an amenable number.

20822586909 is a deficient number, since it is larger than the sum of its proper divisors (6940862307).

20822586909 is an equidigital number, since it uses as much as digits as its factorization.

20822586909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6940862306.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 20822586909 in words is "twenty billion, eight hundred twenty-two million, five hundred eighty-six thousand, nine hundred nine".