206001720 has 96 divisors (see below), whose sum is σ = 671645520. Its totient is φ = 54758400.

The previous prime is 206001709. The next prime is 206001773. The reversal of 206001720 is 27100602.

It is a happy number.

206001720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 206001693 and 206001702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143647 + ... + 145073.

Almost surely, 2^206001720 is an apocalyptic number.

206001720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206001720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335822760).

206001720 is an abundant number, since it is smaller than the sum of its proper divisors (465643800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206001720 is a wasteful number, since it uses less digits than its factorization.

206001720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845 (or 1838 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 206001720 is about 14352.7600133215. The cubic root of 206001720 is about 590.5957020824.

The spelling of 206001720 in words is "two hundred six million, one thousand, seven hundred twenty".