2109192945 has 32 divisors (see below), whose sum is σ = 3571015680. Its totient is φ = 1060090560.

The previous prime is 2109192937. The next prime is 2109192949. The reversal of 2109192945 is 5492919012.

It is not a de Polignac number, because 2109192945 - 2³ = 2109192937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2109192897 and 2109192906.

It is not an unprimeable number, because it can be changed into a prime (2109192949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35062 + ... + 73808.

It is an arithmetic number, because the mean of its divisors is an integer number (111594240).

Almost surely, 2^2109192945 is an apocalyptic number.

It is an amenable number.

2109192945 is a deficient number, since it is larger than the sum of its proper divisors (1461822735).

2109192945 is a wasteful number, since it uses less digits than its factorization.

2109192945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38965.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 2109192945 is about 45925.9506706176. The cubic root of 2109192945 is about 1282.4450629850.

The spelling of 2109192945 in words is "two billion, one hundred nine million, one hundred ninety-two thousand, nine hundred forty-five".