2105403140 has 12 divisors (see below), whose sum is σ = 4421346636. Its totient is φ = 842161248.

The previous prime is 2105403107. The next prime is 2105403197. The reversal of 2105403140 is 413045012.

It can be written as a sum of positive squares in 2 ways, for example, as 1470262336 + 635140804 = 38344^2 + 25202^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 105270157 = 2105403140 / (2 + 1 + 0 + 5 + 4 + 0 + 3 + 1 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52635059 + ... + 52635098.

It is an arithmetic number, because the mean of its divisors is an integer number (368445553).

Almost surely, 2^2105403140 is an apocalyptic number.

2105403140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105403140 is an abundant number, since it is smaller than the sum of its proper divisors (2315943496).

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

2105403140 is a wasteful number, since it uses less digits than its factorization.

2105403140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105270166 (or 105270164 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2105403140 is about 45884.6721683832. The cubic root of 2105403140 is about 1281.6765019446.

Adding to 2105403140 its reverse (413045012), we get a palindrome (2518448152).

The spelling of 2105403140 in words is "two billion, one hundred five million, four hundred three thousand, one hundred forty".