209944292212 has 24 divisors (see below), whose sum is σ = 367983793800. Its totient is φ = 104806158336.

The previous prime is 209944292177. The next prime is 209944292221. The reversal of 209944292212 is 212292449902.

It can be written as a sum of positive squares in 4 ways, for example, as 161454490596 + 48489801616 = 401814^2 + 220204^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11034964 + ... + 11053972.

It is an arithmetic number, because the mean of its divisors is an integer number (15332658075).

Almost surely, 2^209944292212 is an apocalyptic number.

It is an amenable number.

209944292212 is a deficient number, since it is larger than the sum of its proper divisors (158039501588).

209944292212 is a wasteful number, since it uses less digits than its factorization.

209944292212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23235 (or 23233 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 209944292212 in words is "two hundred nine billion, nine hundred forty-four million, two hundred ninety-two thousand, two hundred twelve".