206011620 has 96 divisors (see below), whose sum is σ = 643991040. Its totient is φ = 54673920.

The previous prime is 206011613. The next prime is 206011633. The reversal of 206011620 is 26110602.

It is a happy number.

206011620 is a `hidden beast` number, since 2 + 0 + 601 + 1 + 62 + 0 = 666.

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 = 206011593 and 206011602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129349 + ... + 130931.

It is an arithmetic number, because the mean of its divisors is an integer number (6708240).

Almost surely, 2^206011620 is an apocalyptic number.

206011620 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 206011620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321995520).

206011620 is an abundant number, since it is smaller than the sum of its proper divisors (437979420).

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

206011620 is a wasteful number, since it uses less digits than its factorization.

206011620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1834 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 206011620 is about 14353.1048905803. The cubic root of 206011620 is about 590.6051628510.

The spelling of 206011620 in words is "two hundred six million, eleven thousand, six hundred twenty".