2091920011 has 4 divisors (see below), whose sum is σ = 2092228000. Its totient is φ = 2091612024.

The previous prime is 2091920003. The next prime is 2091920059. The reversal of 2091920011 is 1100291902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2091920011 - 2³ = 2091920003 is a prime.

It is a super-2 number, since 2×2091920011² = 8752258664844480242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091921011) 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, 143571 + ... + 157468.

It is an arithmetic number, because the mean of its divisors is an integer number (523057000).

Almost surely, 2^2091920011 is an apocalyptic number.

2091920011 is a deficient number, since it is larger than the sum of its proper divisors (307989).

2091920011 is an equidigital number, since it uses as much as digits as its factorization.

2091920011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307988.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 2091920011 is about 45737.5120770686. The cubic root of 2091920011 is about 1278.9346626843.

The spelling of 2091920011 in words is "two billion, ninety-one million, nine hundred twenty thousand, eleven".