22904406209 has 4 divisors (see below), whose sum is σ = 23279888340. Its totient is φ = 22528924080.

The previous prime is 22904406193. The next prime is 22904406253. The reversal of 22904406209 is 90260440922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12049891984 + 10854514225 = 109772^2 + 104185^2 .

It is a cyclic number.

It is not a de Polignac number, because 22904406209 - 2⁴ = 22904406193 is a prime.

It is a super-2 number, since 2×22904406209² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22904406299) 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, 187740974 + ... + 187741095.

It is an arithmetic number, because the mean of its divisors is an integer number (5819972085).

Almost surely, 2^22904406209 is an apocalyptic number.

It is an amenable number.

22904406209 is a deficient number, since it is larger than the sum of its proper divisors (375482131).

22904406209 is an equidigital number, since it uses as much as digits as its factorization.

22904406209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375482130.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 22904406209 in words is "twenty-two billion, nine hundred four million, four hundred six thousand, two hundred nine".