21304143430 has 16 divisors (see below), whose sum is σ = 38919809520. Its totient is φ = 8394468192.

The previous prime is 21304143397. The next prime is 21304143431. The reversal of 21304143430 is 3434140312.

It is a junction number, because it is equal to n+sod(n) for n = 21304143395 and 21304143404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304143431) 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, 15897945 + ... + 15899284.

It is an arithmetic number, because the mean of its divisors is an integer number (2432488095).

Almost surely, 2^21304143430 is an apocalyptic number.

21304143430 is a deficient number, since it is larger than the sum of its proper divisors (17615666090).

21304143430 is a wasteful number, since it uses less digits than its factorization.

21304143430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31797303.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21304143430 its reverse (3434140312), we get a palindrome (24738283742).

The spelling of 21304143430 in words is "twenty-one billion, three hundred four million, one hundred forty-three thousand, four hundred thirty".