206030213605 has 32 divisors (see below), whose sum is σ = 255783588480. Its totient is φ = 159251347200.

The previous prime is 206030213591. The next prime is 206030213611. The reversal of 206030213605 is 506312030602.

It is not a de Polignac number, because 206030213605 - 2²¹ = 206028116453 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3591891 + ... + 3648799.

It is an arithmetic number, because the mean of its divisors is an integer number (7993237140).

Almost surely, 2^206030213605 is an apocalyptic number.

It is an amenable number.

206030213605 is a deficient number, since it is larger than the sum of its proper divisors (49753374875).

206030213605 is a wasteful number, since it uses less digits than its factorization.

206030213605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57189.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 206030213605 in words is "two hundred six billion, thirty million, two hundred thirteen thousand, six hundred five".