21130434230 has 16 divisors (see below), whose sum is σ = 38098931904. Its totient is φ = 8437918080.

The previous prime is 21130434217. The next prime is 21130434233. The reversal of 21130434230 is 3243403112.

It is a junction number, because it is equal to n+sod(n) for n = 21130434196 and 21130434205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130434233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775726 + ... + 1787585.

It is an arithmetic number, because the mean of its divisors is an integer number (2381183244).

Almost surely, 2^21130434230 is an apocalyptic number.

21130434230 is a deficient number, since it is larger than the sum of its proper divisors (16968497674).

21130434230 is a wasteful number, since it uses less digits than its factorization.

21130434230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563911.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21130434230 its reverse (3243403112), we get a palindrome (24373837342).

The spelling of 21130434230 in words is "twenty-one billion, one hundred thirty million, four hundred thirty-four thousand, two hundred thirty".