2113660720 has 20 divisors (see below), whose sum is σ = 4914261360. Its totient is φ = 845464256.

The previous prime is 2113660673. The next prime is 2113660727. The reversal of 2113660720 is 270663112.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2113660727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13210300 + ... + 13210459.

It is an arithmetic number, because the mean of its divisors is an integer number (245713068).

Almost surely, 2^2113660720 is an apocalyptic number.

2113660720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113660720 is an abundant number, since it is smaller than the sum of its proper divisors (2800600640).

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

2113660720 is a wasteful number, since it uses less digits than its factorization.

2113660720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26420772 (or 26420766 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 2113660720 is about 45974.5660120898. The cubic root of 2113660720 is about 1283.3499328075.

The spelling of 2113660720 in words is "two billion, one hundred thirteen million, six hundred sixty thousand, seven hundred twenty".