206381996240 has 160 divisors (see below), whose sum is σ = 567794016000. Its totient is φ = 68259631104.

The previous prime is 206381996239. The next prime is 206381996297. The reversal of 206381996240 is 42699183602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20928431 + ... + 20938289.

It is an arithmetic number, because the mean of its divisors is an integer number (3548712600).

Almost surely, 2^206381996240 is an apocalyptic number.

206381996240 is a gapful number since it is divisible by the number (20) 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 206381996240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283897008000).

206381996240 is an abundant number, since it is smaller than the sum of its proper divisors (361412019760).

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

206381996240 is a wasteful number, since it uses less digits than its factorization.

206381996240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11197 (or 11191 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 206381996240 in words is "two hundred six billion, three hundred eighty-one million, nine hundred ninety-six thousand, two hundred forty".