208002213640 has 32 divisors (see below), whose sum is σ = 504005365080. Its totient is φ = 76800817152.

The previous prime is 208002213631. The next prime is 208002213647. The reversal of 208002213640 is 46312200802.

208002213640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 117746432164 + 90255781476 = 343142^2 + 300426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 208002213599 and 208002213608.

It is not an unprimeable number, because it can be changed into a prime (208002213647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200001609 + ... + 200002648.

Almost surely, 2^208002213640 is an apocalyptic number.

208002213640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208002213640 is an abundant number, since it is smaller than the sum of its proper divisors (296003151440).

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

208002213640 is a wasteful number, since it uses less digits than its factorization.

208002213640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400004281 (or 400004277 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 208002213640 in words is "two hundred eight billion, two million, two hundred thirteen thousand, six hundred forty".