206432996618 has 4 divisors (see below), whose sum is σ = 309649494930. Its totient is φ = 103216498308.

The previous prime is 206432996579. The next prime is 206432996639. The reversal of 206432996618 is 816699234602.

It is a happy number.

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., 112746193729 + 93686802889 = 335777^2 + 306083^2 .

It is a super-2 number, since 2×206432996618² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51608249153 + ... + 51608249156.

Almost surely, 2^206432996618 is an apocalyptic number.

206432996618 is a deficient number, since it is larger than the sum of its proper divisors (103216498312).

206432996618 is a wasteful number, since it uses less digits than its factorization.

206432996618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103216498311.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 206432996618 in words is "two hundred six billion, four hundred thirty-two million, nine hundred ninety-six thousand, six hundred eighteen".