21045444230 has 32 divisors (see below), whose sum is σ = 39262639680. Its totient is φ = 8115500160.

The previous prime is 21045444181. The next prime is 21045444239. The reversal of 21045444230 is 3244454012.

It is a junction number, because it is equal to n+sod(n) for n = 21045444193 and 21045444202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045444239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220586 + ... + 301245.

It is an arithmetic number, because the mean of its divisors is an integer number (1226957490).

Almost surely, 2^21045444230 is an apocalyptic number.

21045444230 is a deficient number, since it is larger than the sum of its proper divisors (18217195450).

21045444230 is a wasteful number, since it uses less digits than its factorization.

21045444230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521984.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 21045444230 its reverse (3244454012), we get a palindrome (24289898242).

The spelling of 21045444230 in words is "twenty-one billion, forty-five million, four hundred forty-four thousand, two hundred thirty".