2106840880 has 20 divisors (see below), whose sum is σ = 4898405232. Its totient is φ = 842736320.

The previous prime is 2106840877. The next prime is 2106840881. The reversal of 2106840880 is 880486012.

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 (2106840881) 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, 13167676 + ... + 13167835.

Almost surely, 2^2106840880 is an apocalyptic number.

2106840880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106840880 is an abundant number, since it is smaller than the sum of its proper divisors (2791564352).

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

2106840880 is a wasteful number, since it uses less digits than its factorization.

2106840880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26335524 (or 26335518 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 2106840880 is about 45900.3363822097. The cubic root of 2106840880 is about 1281.9681797783.

The spelling of 2106840880 in words is "two billion, one hundred six million, eight hundred forty thousand, eight hundred eighty".