206542436 has 12 divisors (see below), whose sum is σ = 371218428. Its totient is φ = 100480032.

The previous prime is 206542411. The next prime is 206542447. The reversal of 206542436 is 634245602.

206542436 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 2 ways, for example, as 176358400 + 30184036 = 13280^2 + 5494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697631 + ... + 697926.

It is an arithmetic number, because the mean of its divisors is an integer number (30934869).

Almost surely, 2^206542436 is an apocalyptic number.

It is an amenable number.

206542436 is a deficient number, since it is larger than the sum of its proper divisors (164675992).

206542436 is a wasteful number, since it uses less digits than its factorization.

206542436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395598 (or 1395596 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 206542436 is about 14371.5843246317. The cubic root of 206542436 is about 591.1119850627. Note that the first 3 decimals are identical.

It can be divided in two parts, 20 and 6542436, that added together give a palindrome (6542456).

The spelling of 206542436 in words is "two hundred six million, five hundred forty-two thousand, four hundred thirty-six".