2106139308 has 96 divisors (see below), whose sum is σ = 6211989504. Its totient is φ = 540442368.

The previous prime is 2106139261. The next prime is 2106139309. The reversal of 2106139308 is 8039316012.

It is not an unprimeable number, because it can be changed into a prime (2106139309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14341 + ... + 66467.

It is an arithmetic number, because the mean of its divisors is an integer number (64708224).

Almost surely, 2^2106139308 is an apocalyptic number.

2106139308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2106139308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3105994752).

2106139308 is an abundant number, since it is smaller than the sum of its proper divisors (4105850196).

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

2106139308 is a wasteful number, since it uses less digits than its factorization.

2106139308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52191 (or 52189 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 2106139308 is about 45892.6934053777. The cubic root of 2106139308 is about 1281.8258667322.

The spelling of 2106139308 in words is "two billion, one hundred six million, one hundred thirty-nine thousand, three hundred eight".