206021802 has 64 divisors (see below), whose sum is σ = 485791488. Its totient is φ = 57024000.

The previous prime is 206021801. The next prime is 206021819. The reversal of 206021802 is 208120602.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (206021801) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 311352 + ... + 312012.

It is an arithmetic number, because the mean of its divisors is an integer number (7590492).

Almost surely, 2^206021802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206021802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242895744).

206021802 is an abundant number, since it is smaller than the sum of its proper divisors (279769686).

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

206021802 is a wasteful number, since it uses less digits than its factorization.

206021802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 206021802 is about 14353.4595829716. The cubic root of 206021802 is about 590.6148927920.

The spelling of 206021802 in words is "two hundred six million, twenty-one thousand, eight hundred two".