20430395 has 16 divisors (see below), whose sum is σ = 25608960. Its totient is φ = 15628800.

The previous prime is 20430373. The next prime is 20430409. The reversal of 20430395 is 59303402.

It is not a de Polignac number, because 20430395 - 2¹⁴ = 20414011 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13055 + ... + 14535.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^20430395 is an apocalyptic number.

20430395 is a deficient number, since it is larger than the sum of its proper divisors (5178565).

20430395 is a wasteful number, since it uses less digits than its factorization.

20430395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 20430395 is about 4519.9994469026. Note that the first 3 decimals coincide. The cubic root of 20430395 is about 273.3750787255.

Adding to 20430395 its reverse (59303402), we get a palindrome (79733797).

The spelling of 20430395 in words is "twenty million, four hundred thirty thousand, three hundred ninety-five".