206051018 has 4 divisors (see below), whose sum is σ = 309076530. Its totient is φ = 103025508.

The previous prime is 206051011. The next prime is 206051051. The reversal of 206051018 is 810150602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 196644529 + 9406489 = 14023^2 + 3067^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 206050984 and 206051002.

It is not an unprimeable number, because it can be changed into a prime (206051011) 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 as a sum of consecutive naturals, namely, 51512753 + ... + 51512756.

Almost surely, 2^206051018 is an apocalyptic number.

206051018 is a deficient number, since it is larger than the sum of its proper divisors (103025512).

206051018 is a wasteful number, since it uses less digits than its factorization.

206051018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103025511.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 206051018 is about 14354.4772806257. The cubic root of 206051018 is about 590.6428098845.

The spelling of 206051018 in words is "two hundred six million, fifty-one thousand, eighteen".