209317921082 has 8 divisors (see below), whose sum is σ = 315464924352. Its totient is φ = 104162946300.

The previous prime is 209317921073. The next prime is 209317921097. The reversal of 209317921082 is 280129713902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248006594 + ... + 248007437.

It is an arithmetic number, because the mean of its divisors is an integer number (39433115544).

Almost surely, 2^209317921082 is an apocalyptic number.

209317921082 is a deficient number, since it is larger than the sum of its proper divisors (106147003270).

209317921082 is a wasteful number, since it uses less digits than its factorization.

209317921082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496014244.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 209317921082 in words is "two hundred nine billion, three hundred seventeen million, nine hundred twenty-one thousand, eighty-two".