2105421320 has 16 divisors (see below), whose sum is σ = 4737198060. Its totient is φ = 842168512.

The previous prime is 2105421281. The next prime is 2105421347. The reversal of 2105421320 is 231245012.

It can be written as a sum of positive squares in 2 ways, for example, as 2104790884 + 630436 = 45878^2 + 794^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2105421292 and 2105421301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26317727 + ... + 26317806.

Almost surely, 2^2105421320 is an apocalyptic number.

2105421320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105421320 is an abundant number, since it is smaller than the sum of its proper divisors (2631776740).

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

2105421320 is a wasteful number, since it uses less digits than its factorization.

2105421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52635544 (or 52635540 counting only the distinct ones).

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

The square root of 2105421320 is about 45884.8702733265. The cubic root of 2105421320 is about 1281.6801909945.

Adding to 2105421320 its reverse (231245012), we get a palindrome (2336666332).

The spelling of 2105421320 in words is "two billion, one hundred five million, four hundred twenty-one thousand, three hundred twenty".