2189530945 has 24 divisors (see below), whose sum is σ = 3061649664. Its totient is φ = 1498817376.

The previous prime is 2189530909. The next prime is 2189530957. The reversal of 2189530945 is 5490359812.

It is not a de Polignac number, because 2189530945 - 2¹⁵ = 2189498177 is a prime.

It is a super-2 number, since 2×2189530945² = 9588091518225186050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2189530895 and 2189530904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141354 + ... + 156076.

It is an arithmetic number, because the mean of its divisors is an integer number (127568736).

Almost surely, 2^2189530945 is an apocalyptic number.

It is an amenable number.

2189530945 is a deficient number, since it is larger than the sum of its proper divisors (872118719).

2189530945 is a wasteful number, since it uses less digits than its factorization.

2189530945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15349 (or 15342 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 2189530945 is about 46792.4240128677. The cubic root of 2189530945 is about 1298.5251410045.

The spelling of 2189530945 in words is "two billion, one hundred eighty-nine million, five hundred thirty thousand, nine hundred forty-five".