2106202440 has 64 divisors (see below), whose sum is σ = 6651172800. Its totient is φ = 532092672.

The previous prime is 2106202429. The next prime is 2106202447. The reversal of 2106202440 is 442026012.

It is not an unprimeable number, because it can be changed into a prime (2106202447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459607 + ... + 464166.

It is an arithmetic number, because the mean of its divisors is an integer number (103924575).

Almost surely, 2^2106202440 is an apocalyptic number.

2106202440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106202440 is an abundant number, since it is smaller than the sum of its proper divisors (4544970360).

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

2106202440 is a wasteful number, since it uses less digits than its factorization.

2106202440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923806 (or 923802 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2106202440 is about 45893.3812221327. The cubic root of 2106202440 is about 1281.8386742772.

Adding to 2106202440 its reverse (442026012), we get a palindrome (2548228452).

The spelling of 2106202440 in words is "two billion, one hundred six million, two hundred two thousand, four hundred forty".