206664020 has 48 divisors (see below), whose sum is σ = 451725120. Its totient is φ = 79355136.

The previous prime is 206664001. The next prime is 206664023. The reversal of 206664020 is 20466602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206664023) 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, 48704 + ... + 52776.

It is an arithmetic number, because the mean of its divisors is an integer number (9410940).

Almost surely, 2^206664020 is an apocalyptic number.

206664020 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 206664020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225862560).

206664020 is an abundant number, since it is smaller than the sum of its proper divisors (245061100).

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

206664020 is a wasteful number, since it uses less digits than its factorization.

206664020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 206664020 is about 14375.8137160997. The cubic root of 206664020 is about 591.2279510004.

The spelling of 206664020 in words is "two hundred six million, six hundred sixty-four thousand, twenty".