20430043420 has 48 divisors (see below), whose sum is σ = 45439682400. Its totient is φ = 7689129984.

The previous prime is 20430043409. The next prime is 20430043421. The reversal of 20430043420 is 2434003402.

It is a junction number, because it is equal to n+sod(n) for n = 20430043391 and 20430043400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430043421) 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, 1689556 + ... + 1701604.

It is an arithmetic number, because the mean of its divisors is an integer number (946660050).

Almost surely, 2^20430043420 is an apocalyptic number.

20430043420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430043420 is an abundant number, since it is smaller than the sum of its proper divisors (25009638980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20430043420 is a wasteful number, since it uses less digits than its factorization.

20430043420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17062 (or 17060 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20430043420 its reverse (2434003402), we get a palindrome (22864046822).

The spelling of 20430043420 in words is "twenty billion, four hundred thirty million, forty-three thousand, four hundred twenty".