20000122209 has 80 divisors (see below), whose sum is σ = 33403550400. Its totient is φ = 11851370496.

The previous prime is 20000122201. The next prime is 20000122249. The reversal of 20000122209 is 90222100002.

It is not a de Polignac number, because 20000122209 - 2³ = 20000122201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000122191 and 20000122200.

It is not an unprimeable number, because it can be changed into a prime (20000122201) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9914769 + ... + 9916785.

It is an arithmetic number, because the mean of its divisors is an integer number (417544380).

Almost surely, 2^20000122209 is an apocalyptic number.

It is an amenable number.

20000122209 is a deficient number, since it is larger than the sum of its proper divisors (13403428191).

20000122209 is a wasteful number, since it uses less digits than its factorization.

20000122209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 20000122209 in words is "twenty billion, one hundred twenty-two thousand, two hundred nine".