209747042304 has 224 divisors, whose sum is σ = 623382324480. Its totient is φ = 62337318912.

The previous prime is 209747042293. The next prime is 209747042339. The reversal of 209747042304 is 403240747902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7924837 + ... + 7951259.

Almost surely, 2^209747042304 is an apocalyptic number.

209747042304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209747042304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311691162240).

209747042304 is an abundant number, since it is smaller than the sum of its proper divisors (413635282176).

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

209747042304 is a wasteful number, since it uses less digits than its factorization.

209747042304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26488 (or 26464 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The spelling of 209747042304 in words is "two hundred nine billion, seven hundred forty-seven million, forty-two thousand, three hundred four".