21000254230 has 32 divisors (see below), whose sum is σ = 37949123520. Its totient is φ = 8367131520.

The previous prime is 21000254227. The next prime is 21000254311. The reversal of 21000254230 is 3245200012.

It is a junction number, because it is equal to n+sod(n) for n = 21000254198 and 21000254207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2898172 + ... + 2905408.

It is an arithmetic number, because the mean of its divisors is an integer number (1185910110).

Almost surely, 2^21000254230 is an apocalyptic number.

21000254230 is a deficient number, since it is larger than the sum of its proper divisors (16948869290).

21000254230 is a wasteful number, since it uses less digits than its factorization.

21000254230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8344.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 21000254230 its reverse (3245200012), we get a palindrome (24245454242).

The spelling of 21000254230 in words is "twenty-one billion, two hundred fifty-four thousand, two hundred thirty".