2006089821 has 20 divisors (see below), whose sum is σ = 3024771552. Its totient is φ = 1324888488.

The previous prime is 2006089807. The next prime is 2006089843. The reversal of 2006089821 is 1289806002.

2006089821 is a `hidden beast` number, since 20 + 0 + 608 + 9 + 8 + 21 = 666.

It is not a de Polignac number, because 2006089821 - 2¹³ = 2006081629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006089871) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107065 + ... + 124398.

Almost surely, 2^2006089821 is an apocalyptic number.

It is an amenable number.

2006089821 is a deficient number, since it is larger than the sum of its proper divisors (1018681731).

2006089821 is a wasteful number, since it uses less digits than its factorization.

2006089821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231582 (or 231573 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2006089821 is about 44789.3940682390. The cubic root of 2006089821 is about 1261.1985364382.

The spelling of 2006089821 in words is "two billion, six million, eighty-nine thousand, eight hundred twenty-one".