20430430 has 32 divisors (see below), whose sum is σ = 39782016. Its totient is φ = 7524864.

The previous prime is 20430409. The next prime is 20430439. The reversal of 20430430 is 3403402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430439) by changing a digit.

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, 6712 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (1243188).

Almost surely, 2^20430430 is an apocalyptic number.

20430430 is a deficient number, since it is larger than the sum of its proper divisors (19351586).

20430430 is a wasteful number, since it uses less digits than its factorization.

20430430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20430430 is about 4520.0033185829. The cubic root of 20430430 is about 273.3752348348.

Adding to 20430430 its reverse (3403402), we get a palindrome (23833832).

The spelling of 20430430 in words is "twenty million, four hundred thirty thousand, four hundred thirty".