2105342740 has 12 divisors (see below), whose sum is σ = 4421219796. Its totient is φ = 842137088.

The previous prime is 2105342731. The next prime is 2105342749. The reversal of 2105342740 is 472435012.

It is an interprime number because it is at equal distance from previous prime (2105342731) and next prime (2105342749).

It can be written as a sum of positive squares in 2 ways, for example, as 235991044 + 1869351696 = 15362^2 + 43236^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2105342699 and 2105342708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105342749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52633549 + ... + 52633588.

It is an arithmetic number, because the mean of its divisors is an integer number (368434983).

Almost surely, 2^2105342740 is an apocalyptic number.

2105342740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105342740 is an abundant number, since it is smaller than the sum of its proper divisors (2315877056).

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

2105342740 is a wasteful number, since it uses less digits than its factorization.

2105342740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105267146 (or 105267144 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2105342740 is about 45884.0139918033. The cubic root of 2105342740 is about 1281.6642455428.

Adding to 2105342740 its reverse (472435012), we get a palindrome (2577777752).

The spelling of 2105342740 in words is "two billion, one hundred five million, three hundred forty-two thousand, seven hundred forty".