206956375021 has 8 divisors (see below), whose sum is σ = 239051214144. Its totient is φ = 177074973120.

The previous prime is 206956375019. The next prime is 206956375117. The reversal of 206956375021 is 120573659602.

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

It is a cyclic number.

It is not a de Polignac number, because 206956375021 - 2¹ = 206956375019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206956375001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553359105 + ... + 553359478.

It is an arithmetic number, because the mean of its divisors is an integer number (29881401768).

Almost surely, 2^206956375021 is an apocalyptic number.

It is an amenable number.

206956375021 is a deficient number, since it is larger than the sum of its proper divisors (32094839123).

206956375021 is a wasteful number, since it uses less digits than its factorization.

206956375021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106718611.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 206956375021 in words is "two hundred six billion, nine hundred fifty-six million, three hundred seventy-five thousand, twenty-one".