2011663720 has 192 divisors, whose sum is σ = 5501986560. Its totient is φ = 657930240.

The previous prime is 2011663699. The next prime is 2011663723. The reversal of 2011663720 is 273661102.

It is not an unprimeable number, because it can be changed into a prime (2011663723) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1891909 + ... + 1892971.

It is an arithmetic number, because the mean of its divisors is an integer number (28656180).

Almost surely, 2^2011663720 is an apocalyptic number.

2011663720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011663720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2750993280).

2011663720 is an abundant number, since it is smaller than the sum of its proper divisors (3490322840).

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

2011663720 is a wasteful number, since it uses less digits than its factorization.

2011663720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 1121 counting only the distinct ones).

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

The square root of 2011663720 is about 44851.5743313432. The cubic root of 2011663720 is about 1262.3655318013.

The spelling of 2011663720 in words is "two billion, eleven million, six hundred sixty-three thousand, seven hundred twenty".