206536842 has 24 divisors (see below), whose sum is σ = 473820516. Its totient is φ = 64795776.

The previous prime is 206536831. The next prime is 206536843. The reversal of 206536842 is 248635602.

It can be written as a sum of positive squares in 2 ways, for example, as 190688481 + 15848361 = 13809^2 + 3981^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206536797 and 206536806.

It is not an unprimeable number, because it can be changed into a prime (206536843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337173 + ... + 337784.

Almost surely, 2^206536842 is an apocalyptic number.

206536842 is an abundant number, since it is smaller than the sum of its proper divisors (267283674).

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

206536842 is a wasteful number, since it uses less digits than its factorization.

206536842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674982 (or 674979 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 206536842 is about 14371.3897031568. The cubic root of 206536842 is about 591.1066484510.

It can be divided in two parts, 20653 and 6842, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 206536842 in words is "two hundred six million, five hundred thirty-six thousand, eight hundred forty-two".