2106620340 has 48 divisors (see below), whose sum is σ = 6434769600. Its totient is φ = 510695680.

The previous prime is 2106620281. The next prime is 2106620359. The reversal of 2106620340 is 430266012.

It is a self number, because there is not a number n which added to its sum of digits gives 2106620340.

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 15 ways as a sum of consecutive naturals, for example, 1595265 + ... + 1596584.

It is an arithmetic number, because the mean of its divisors is an integer number (134057700).

Almost surely, 2^2106620340 is an apocalyptic number.

2106620340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106620340 is an abundant number, since it is smaller than the sum of its proper divisors (4328149260).

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

2106620340 is a wasteful number, since it uses less digits than its factorization.

2106620340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191872 (or 3191870 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2106620340 is about 45897.9339404292. The cubic root of 2106620340 is about 1281.9234469067.

Adding to 2106620340 its reverse (430266012), we get a palindrome (2536886352).

The spelling of 2106620340 in words is "two billion, one hundred six million, six hundred twenty thousand, three hundred forty".