2091869051 has 4 divisors (see below), whose sum is σ = 2094322272. Its totient is φ = 2089415832.

The previous prime is 2091869047. The next prime is 2091869069. The reversal of 2091869051 is 1509681902.

It is a happy number.

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 2091869051 - 2² = 2091869047 is a prime.

It is a super-2 number, since 2×2091869051² = 8751832253063281202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091869081) 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, 1225331 + ... + 1227036.

It is an arithmetic number, because the mean of its divisors is an integer number (523580568).

Almost surely, 2^2091869051 is an apocalyptic number.

2091869051 is a deficient number, since it is larger than the sum of its proper divisors (2453221).

2091869051 is an equidigital number, since it uses as much as digits as its factorization.

2091869051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453220.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 2091869051 is about 45736.9549817213. The cubic root of 2091869051 is about 1278.9242774816.

The spelling of 2091869051 in words is "two billion, ninety-one million, eight hundred sixty-nine thousand, fifty-one".