206620538873 has 16 divisors (see below), whose sum is σ = 241650647040. Its totient is φ = 172969379856.

The previous prime is 206620538867. The next prime is 206620538941. The reversal of 206620538873 is 378835026602.

It is not a de Polignac number, because 206620538873 - 2¹⁶ = 206620473337 is a prime.

It is a super-2 number, since 2×206620538873² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206620538473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4524488 + ... + 4569926.

It is an arithmetic number, because the mean of its divisors is an integer number (15103165440).

Almost surely, 2^206620538873 is an apocalyptic number.

It is an amenable number.

206620538873 is a deficient number, since it is larger than the sum of its proper divisors (35030108167).

206620538873 is a wasteful number, since it uses less digits than its factorization.

206620538873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60596.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 206620538873 in words is "two hundred six billion, six hundred twenty million, five hundred thirty-eight thousand, eight hundred seventy-three".