20430347265 has 96 divisors (see below), whose sum is σ = 38285470080. Its totient is φ = 10045099008.

The previous prime is 20430347237. The next prime is 20430347269. The reversal of 20430347265 is 56274303402.

20430347265 is a `hidden beast` number, since 20 + 4 + 30 + 347 + 265 = 666.

It is not a de Polignac number, because 20430347265 - 2⁹ = 20430346753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20430347269) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11653629 + ... + 11655381.

It is an arithmetic number, because the mean of its divisors is an integer number (398806980).

Almost surely, 2^20430347265 is an apocalyptic number.

It is an amenable number.

20430347265 is a deficient number, since it is larger than the sum of its proper divisors (17855122815).

20430347265 is a wasteful number, since it uses less digits than its factorization.

20430347265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

The spelling of 20430347265 in words is "twenty billion, four hundred thirty million, three hundred forty-seven thousand, two hundred sixty-five".