2006213805 has 32 divisors (see below), whose sum is σ = 3649557120. Its totient is φ = 1045094400.

The previous prime is 2006213791. The next prime is 2006213821. The reversal of 2006213805 is 5083126002.

2006213805 is a `hidden beast` number, since 2 + 0 + 0 + 621 + 38 + 0 + 5 = 666.

2006213805 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2006213805 - 2²⁹ = 1469342893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166996 + ... + 178605.

It is an arithmetic number, because the mean of its divisors is an integer number (114048660).

Almost surely, 2^2006213805 is an apocalyptic number.

It is an amenable number.

2006213805 is a deficient number, since it is larger than the sum of its proper divisors (1643343315).

2006213805 is a wasteful number, since it uses less digits than its factorization.

2006213805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345658 (or 345652 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2006213805 is about 44790.7781245202. The cubic root of 2006213805 is about 1261.2245181957.

Adding to 2006213805 its reverse (5083126002), we get a palindrome (7089339807).

The spelling of 2006213805 in words is "two billion, six million, two hundred thirteen thousand, eight hundred five".