2011723720 has 32 divisors (see below), whose sum is σ = 4551681600. Its totient is φ = 800191168.

The previous prime is 2011723717. The next prime is 2011723733. The reversal of 2011723720 is 273271102.

It is a super-2 number, since 2×2011723720² = 8094064651221276800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133324 + ... + 147643.

It is an arithmetic number, because the mean of its divisors is an integer number (142240050).

Almost surely, 2^2011723720 is an apocalyptic number.

2011723720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011723720 is an abundant number, since it is smaller than the sum of its proper divisors (2539957880).

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

2011723720 is a wasteful number, since it uses less digits than its factorization.

2011723720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281157 (or 281153 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 2011723720 is about 44852.2431991980. The cubic root of 2011723720 is about 1262.3780821393.

Adding to 2011723720 its reverse (273271102), we get a palindrome (2284994822).

The spelling of 2011723720 in words is "two billion, eleven million, seven hundred twenty-three thousand, seven hundred twenty".