2106621330 has 32 divisors (see below), whose sum is σ = 5515518528. Its totient is φ = 510696000.

The previous prime is 2106621329. The next prime is 2106621353. The reversal of 2106621330 is 331266012.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2106621330.

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 15 ways as a sum of consecutive naturals, for example, 3191521 + ... + 3192180.

It is an arithmetic number, because the mean of its divisors is an integer number (172359954).

Almost surely, 2^2106621330 is an apocalyptic number.

2106621330 is an abundant number, since it is smaller than the sum of its proper divisors (3408897198).

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

2106621330 is a wasteful number, since it uses less digits than its factorization.

2106621330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383722.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 2106621330 is about 45897.9447252271. The cubic root of 2106621330 is about 1281.9236477187.

Adding to 2106621330 its reverse (331266012), we get a palindrome (2437887342).

The spelling of 2106621330 in words is "two billion, one hundred six million, six hundred twenty-one thousand, three hundred thirty".