2105321434 has 4 divisors (see below), whose sum is σ = 3157982154. Its totient is φ = 1052660716.

The previous prime is 2105321417. The next prime is 2105321447. The reversal of 2105321434 is 4341235012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2001220225 + 104101209 = 44735^2 + 10203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2105321399 and 2105321408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526330357 + ... + 526330360.

Almost surely, 2^2105321434 is an apocalyptic number.

2105321434 is a deficient number, since it is larger than the sum of its proper divisors (1052660720).

2105321434 is a wasteful number, since it uses less digits than its factorization.

2105321434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052660719.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2105321434 is about 45883.7818188519. The cubic root of 2105321434 is about 1281.6599220614.

Adding to 2105321434 its reverse (4341235012), we get a palindrome (6446556446).

The spelling of 2105321434 in words is "two billion, one hundred five million, three hundred twenty-one thousand, four hundred thirty-four".