2099021905 has 8 divisors (see below), whose sum is σ = 2534280192. Its totient is φ = 1668914928.

The previous prime is 2099021879. The next prime is 2099021917. The reversal of 2099021905 is 5091209902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2099021905 - 2¹³ = 2099013713 is a prime.

It is a Duffinian 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, 1286929 + ... + 1288558.

It is an arithmetic number, because the mean of its divisors is an integer number (316785024).

Almost surely, 2^2099021905 is an apocalyptic number.

It is an amenable number.

2099021905 is a deficient number, since it is larger than the sum of its proper divisors (435258287).

2099021905 is a wasteful number, since it uses less digits than its factorization.

2099021905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575655.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 2099021905 is about 45815.0838152677. The cubic root of 2099021905 is about 1280.3803201323.

The spelling of 2099021905 in words is "two billion, ninety-nine million, twenty-one thousand, nine hundred five".