209229018240 has 192 divisors, whose sum is σ = 733058887680. Its totient is φ = 50722129920.

The previous prime is 209229018217. The next prime is 209229018283. The reversal of 209229018240 is 42810922902.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217984 + ... + 682623.

It is an arithmetic number, because the mean of its divisors is an integer number (3818015040).

Almost surely, 2^209229018240 is an apocalyptic number.

209229018240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209229018240 is an abundant number, since it is smaller than the sum of its proper divisors (523829869440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209229018240 is a wasteful number, since it uses less digits than its factorization.

209229018240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900651 (or 900628 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 209229018240 in words is "two hundred nine billion, two hundred twenty-nine million, eighteen thousand, two hundred forty".