21230332234 has 16 divisors (see below), whose sum is σ = 31891105440. Its totient is φ = 10599977520.

The previous prime is 21230332181. The next prime is 21230332289. The reversal of 21230332234 is 43223303212.

It is a junction number, because it is equal to n+sod(n) for n = 21230332199 and 21230332208.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7144369 + ... + 7147339.

It is an arithmetic number, because the mean of its divisors is an integer number (1993194090).

Almost surely, 2^21230332234 is an apocalyptic number.

21230332234 is a deficient number, since it is larger than the sum of its proper divisors (10660773206).

21230332234 is a wasteful number, since it uses less digits than its factorization.

21230332234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21230332234 its reverse (43223303212), we get a palindrome (64453635446).

The spelling of 21230332234 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-two thousand, two hundred thirty-four".