2099664880 has 20 divisors (see below), whose sum is σ = 4881721032. Its totient is φ = 839865920.

The previous prime is 2099664869. The next prime is 2099664893. The reversal of 2099664880 is 884669902.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13122826 + ... + 13122985.

Almost surely, 2^2099664880 is an apocalyptic number.

2099664880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2099664880 is an abundant number, since it is smaller than the sum of its proper divisors (2782056152).

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

2099664880 is a wasteful number, since it uses less digits than its factorization.

2099664880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26245824 (or 26245818 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 2099664880 is about 45822.1003447027. The cubic root of 2099664880 is about 1280.5110426828.

The spelling of 2099664880 in words is "two billion, ninety-nine million, six hundred sixty-four thousand, eight hundred eighty".