2101342440 has 128 divisors (see below), whose sum is σ = 6605291520. Its totient is φ = 534124800.

The previous prime is 2101342433. The next prime is 2101342499. The reversal of 2101342440 is 442431012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245025 + ... + 253455.

It is an arithmetic number, because the mean of its divisors is an integer number (51603840).

Almost surely, 2^2101342440 is an apocalyptic number.

2101342440 is a gapful number since it is divisible by the number (20) 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 2101342440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3302645760).

2101342440 is an abundant number, since it is smaller than the sum of its proper divisors (4503949080).

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

2101342440 is a wasteful number, since it uses less digits than its factorization.

2101342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543 (or 8539 counting only the distinct ones).

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

The square root of 2101342440 is about 45840.4018306995. The cubic root of 2101342440 is about 1280.8519799888.

Adding to 2101342440 its reverse (442431012), we get a palindrome (2543773452).

The spelling of 2101342440 in words is "two billion, one hundred one million, three hundred forty-two thousand, four hundred forty".