206820073001 has 4 divisors (see below), whose sum is σ = 215812250112. Its totient is φ = 197827895892.

The previous prime is 206820072959. The next prime is 206820073021. The reversal of 206820073001 is 100370028602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206820073001 - 2²² = 206815878697 is a prime.

It is a super-2 number, since 2×206820073001² (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 (206820073021) 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, 4496088521 + ... + 4496088566.

It is an arithmetic number, because the mean of its divisors is an integer number (53953062528).

Almost surely, 2^206820073001 is an apocalyptic number.

It is an amenable number.

206820073001 is a deficient number, since it is larger than the sum of its proper divisors (8992177111).

206820073001 is an equidigital number, since it uses as much as digits as its factorization.

206820073001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8992177110.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 206820073001 in words is "two hundred six billion, eight hundred twenty million, seventy-three thousand, one".