20430404430 has 32 divisors (see below), whose sum is σ = 49052330784. Its totient is φ = 5445956736.

The previous prime is 20430404429. The next prime is 20430404447. The reversal of 20430404430 is 3440403402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430404430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56457 + ... + 209876.

It is an arithmetic number, because the mean of its divisors is an integer number (1532885337).

Almost surely, 2^20430404430 is an apocalyptic number.

20430404430 is an abundant number, since it is smaller than the sum of its proper divisors (28621926354).

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

20430404430 is a wasteful number, since it uses less digits than its factorization.

20430404430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268900.

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20430404430 its reverse (3440403402), we get a palindrome (23870807832).

The spelling of 20430404430 in words is "twenty billion, four hundred thirty million, four hundred four thousand, four hundred thirty".