2099667840 has 64 divisors (see below), whose sum is σ = 6692697360. Its totient is φ = 559910912.

The previous prime is 2099667833. The next prime is 2099667883. The reversal of 2099667840 is 487669902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544869 + ... + 548708.

Almost surely, 2^2099667840 is an apocalyptic number.

2099667840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2099667840 is an abundant number, since it is smaller than the sum of its proper divisors (4593029520).

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

2099667840 is a wasteful number, since it uses less digits than its factorization.

2099667840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093599 (or 1093587 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 2099667840 is about 45822.1326435163. The cubic root of 2099667840 is about 1280.5116444155.

The spelling of 2099667840 in words is "two billion, ninety-nine million, six hundred sixty-seven thousand, eight hundred forty".