20122209 has 16 divisors (see below), whose sum is σ = 29917440. Its totient is φ = 13366800.

The previous prime is 20122199. The next prime is 20122213. The reversal of 20122209 is 90222102.

It is not a de Polignac number, because 20122209 - 2¹¹ = 20120161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122191 and 20122200.

It is not an unprimeable number, because it can be changed into a prime (20126209) 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, 7384 + ... + 9734.

It is an arithmetic number, because the mean of its divisors is an integer number (1869840).

Almost surely, 2^20122209 is an apocalyptic number.

It is an amenable number.

20122209 is a deficient number, since it is larger than the sum of its proper divisors (9795231).

20122209 is a wasteful number, since it uses less digits than its factorization.

20122209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2671 counting only the distinct ones).

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

The square root of 20122209 is about 4485.7785277474. The cubic root of 20122209 is about 271.9935164617.

The spelling of 20122209 in words is "twenty million, one hundred twenty-two thousand, two hundred nine".