2081100080 has 80 divisors (see below), whose sum is σ = 4913685504. Its totient is φ = 819609600.

The previous prime is 2081100061. The next prime is 2081100103. The reversal of 2081100080 is 800011802.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1807505 + ... + 1808655.

Almost surely, 2^2081100080 is an apocalyptic number.

2081100080 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 2081100080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456842752).

2081100080 is an abundant number, since it is smaller than the sum of its proper divisors (2832585424).

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

2081100080 is a wasteful number, since it uses less digits than its factorization.

2081100080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 2081100080 is about 45619.0758345673. The cubic root of 2081100080 is about 1276.7258606656.

Adding to 2081100080 its reverse (800011802), we get a palindrome (2881111882).

The spelling of 2081100080 in words is "two billion, eighty-one million, one hundred thousand, eighty".