2006836821 has 48 divisors (see below), whose sum is σ = 3256606080. Its totient is φ = 1180172160.

The previous prime is 2006836787. The next prime is 2006836847. The reversal of 2006836821 is 1286386002.

It is not a de Polignac number, because 2006836821 - 2⁹ = 2006836309 is a prime.

It is a super-2 number, since 2×2006836821² = 8054788052242772082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006836861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2391520 + ... + 2392358.

It is an arithmetic number, because the mean of its divisors is an integer number (67845960).

Almost surely, 2^2006836821 is an apocalyptic number.

It is an amenable number.

2006836821 is a deficient number, since it is larger than the sum of its proper divisors (1249769259).

2006836821 is a wasteful number, since it uses less digits than its factorization.

2006836821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2006836821 is about 44797.7323198396. The cubic root of 2006836821 is about 1261.3550595715.

The spelling of 2006836821 in words is "two billion, six million, eight hundred thirty-six thousand, eight hundred twenty-one".