2105412520 has 16 divisors (see below), whose sum is σ = 4737178260. Its totient is φ = 842164992.

The previous prime is 2105412511. The next prime is 2105412539. The reversal of 2105412520 is 252145012.

It can be written as a sum of positive squares in 2 ways, for example, as 2100755556 + 4656964 = 45834^2 + 2158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2105412491 and 2105412500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26317617 + ... + 26317696.

Almost surely, 2^2105412520 is an apocalyptic number.

2105412520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105412520 is an abundant number, since it is smaller than the sum of its proper divisors (2631765740).

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

2105412520 is a wasteful number, since it uses less digits than its factorization.

2105412520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52635324 (or 52635320 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2105412520 is about 45884.7743810515. The cubic root of 2105412520 is about 1281.6784053185.

Adding to 2105412520 its reverse (252145012), we get a palindrome (2357557532).

The spelling of 2105412520 in words is "two billion, one hundred five million, four hundred twelve thousand, five hundred twenty".