2001105320 has 16 divisors (see below), whose sum is σ = 4502487060. Its totient is φ = 800442112.

The previous prime is 2001105311. The next prime is 2001105331. The reversal of 2001105320 is 235011002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1859161924 + 141943396 = 43118^2 + 11914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001105295 and 2001105304.

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, 25013777 + ... + 25013856.

Almost surely, 2^2001105320 is an apocalyptic number.

2001105320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001105320 is an abundant number, since it is smaller than the sum of its proper divisors (2501381740).

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

2001105320 is a wasteful number, since it uses less digits than its factorization.

2001105320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50027644 (or 50027640 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2001105320 is about 44733.7156963291. The cubic root of 2001105320 is about 1260.1531098059.

Adding to 2001105320 its reverse (235011002), we get a palindrome (2236116322).

The spelling of 2001105320 in words is "two billion, one million, one hundred five thousand, three hundred twenty".