206620243453 has 8 divisors (see below), whose sum is σ = 227941282296. Its totient is φ = 186074515200.

The previous prime is 206620243451. The next prime is 206620243493. The reversal of 206620243453 is 354342026602.

It can be written as a sum of positive squares in 4 ways, for example, as 36634725604 + 169985517849 = 191402^2 + 412293^2 .

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 206620243453 - 2¹ = 206620243451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206620243451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193827088 + ... + 193828153.

It is an arithmetic number, because the mean of its divisors is an integer number (28492660287).

Almost surely, 2^206620243453 is an apocalyptic number.

It is an amenable number.

206620243453 is a deficient number, since it is larger than the sum of its proper divisors (21321038843).

206620243453 is a wasteful number, since it uses less digits than its factorization.

206620243453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387655295.

The product of its (nonzero) digits is 207360, while the sum is 37.

The spelling of 206620243453 in words is "two hundred six billion, six hundred twenty million, two hundred forty-three thousand, four hundred fifty-three".