2001115320 has 32 divisors (see below), whose sum is σ = 6003346320. Its totient is φ = 533630720.

The previous prime is 2001115301. The next prime is 2001115343. The reversal of 2001115320 is 235111002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2001115320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8337861 + ... + 8338100.

Almost surely, 2^2001115320 is an apocalyptic number.

2001115320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001115320 is an abundant number, since it is smaller than the sum of its proper divisors (4002231000).

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

2001115320 is a wasteful number, since it uses less digits than its factorization.

2001115320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16675975 (or 16675971 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 2001115320 is about 44733.8274687065. The cubic root of 2001115320 is about 1260.1552088975.

Adding to 2001115320 its reverse (235111002), we get a palindrome (2236226322).

The spelling of 2001115320 in words is "two billion, one million, one hundred fifteen thousand, three hundred twenty".