2011317680 has 20 divisors (see below), whose sum is σ = 4676313792. Its totient is φ = 804527040.

The previous prime is 2011317667. The next prime is 2011317683. The reversal of 2011317680 is 867131102.

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 (2011317683) 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, 12570656 + ... + 12570815.

Almost surely, 2^2011317680 is an apocalyptic number.

2011317680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011317680 is an abundant number, since it is smaller than the sum of its proper divisors (2664996112).

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

2011317680 is a wasteful number, since it uses less digits than its factorization.

2011317680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25141484 (or 25141478 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2011317680 is about 44847.7165527968. The cubic root of 2011317680 is about 1262.2931449482.

Adding to 2011317680 its reverse (867131102), we get a palindrome (2878448782).

The spelling of 2011317680 in words is "two billion, eleven million, three hundred seventeen thousand, six hundred eighty".