2006902081 has 4 divisors (see below), whose sum is σ = 2044768212. Its totient is φ = 1969035952.

The previous prime is 2006902067. The next prime is 2006902097. The reversal of 2006902081 is 1802096002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 620010000 + 1386892081 = 24900^2 + 37241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006902081 - 2⁵ = 2006902049 is a prime.

It is a super-3 number, since 3×2006902081³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2006902061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18932986 + ... + 18933091.

It is an arithmetic number, because the mean of its divisors is an integer number (511192053).

Almost surely, 2^2006902081 is an apocalyptic number.

It is an amenable number.

2006902081 is a deficient number, since it is larger than the sum of its proper divisors (37866131).

2006902081 is an equidigital number, since it uses as much as digits as its factorization.

2006902081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37866130.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2006902081 is about 44798.4606990017. The cubic root of 2006902081 is about 1261.3687320233.

Adding to 2006902081 its reverse (1802096002), we get a palindrome (3808998083).

The spelling of 2006902081 in words is "two billion, six million, nine hundred two thousand, eighty-one".