209321322338 has 18 divisors (see below), whose sum is σ = 331396570251. Its totient is φ = 99146382084.

The previous prime is 209321322323. The next prime is 209321322367. The reversal of 209321322338 is 833223123902.

209321322338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 104660661169 + 104660661169 = 323513^2 + 323513^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=323513.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12284981 + ... + 12302007.

Almost surely, 2^209321322338 is an apocalyptic number.

209321322338 is a deficient number, since it is larger than the sum of its proper divisors (122075247913).

209321322338 is an frugal number, since it uses more digits than its factorization.

209321322338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34094 (or 17048 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 209321322338 in words is "two hundred nine billion, three hundred twenty-one million, three hundred twenty-two thousand, three hundred thirty-eight".