2194843845 has 16 divisors (see below), whose sum is σ = 3539404800. Its totient is φ = 1161365184.

The previous prime is 2194843841. The next prime is 2194843877. The reversal of 2194843845 is 5483484912.

It is not a de Polignac number, because 2194843845 - 2² = 2194843841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2194843794 and 2194843803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194843841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574170 + ... + 577979.

It is an arithmetic number, because the mean of its divisors is an integer number (221212800).

Almost surely, 2^2194843845 is an apocalyptic number.

It is an amenable number.

2194843845 is a deficient number, since it is larger than the sum of its proper divisors (1344560955).

2194843845 is a wasteful number, since it uses less digits than its factorization.

2194843845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152284.

The product of its digits is 1105920, while the sum is 48.

The square root of 2194843845 is about 46849.1605581146. The cubic root of 2194843845 is about 1299.5745836802.

The spelling of 2194843845 in words is "two billion, one hundred ninety-four million, eight hundred forty-three thousand, eight hundred forty-five".