206913829690 has 8 divisors (see below), whose sum is σ = 372444893460. Its totient is φ = 82765531872.

The previous prime is 206913829687. The next prime is 206913829691. The reversal of 206913829690 is 96928319602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 201601898001 + 5311931689 = 449001^2 + 72883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×206913829690⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (206913829691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10345691475 + ... + 10345691494.

Almost surely, 2^206913829690 is an apocalyptic number.

206913829690 is a deficient number, since it is larger than the sum of its proper divisors (165531063770).

206913829690 is a wasteful number, since it uses less digits than its factorization.

206913829690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20691382976.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 206913829690 in words is "two hundred six billion, nine hundred thirteen million, eight hundred twenty-nine thousand, six hundred ninety".