209354244086 has 32 divisors (see below), whose sum is σ = 339066550368. Its totient is φ = 96374234880.

The previous prime is 209354244083. The next prime is 209354244091. The reversal of 209354244086 is 680442453902.

It is a self number, because there is not a number n which added to its sum of digits gives 209354244086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209354244083) 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, 18009356 + ... + 18020976.

It is an arithmetic number, because the mean of its divisors is an integer number (10595829699).

Almost surely, 2^209354244086 is an apocalyptic number.

209354244086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

209354244086 is a deficient number, since it is larger than the sum of its proper divisors (129712306282).

209354244086 is a wasteful number, since it uses less digits than its factorization.

209354244086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13376.

The product of its (nonzero) digits is 1658880, while the sum is 47.

Adding to 209354244086 its reverse (680442453902), we get a palindrome (889796697988).

The spelling of 209354244086 in words is "two hundred nine billion, three hundred fifty-four million, two hundred forty-four thousand, eighty-six".