21303202244 has 12 divisors (see below), whose sum is σ = 38147595024. Its totient is φ = 10403889384.

The previous prime is 21303202241. The next prime is 21303202253. The reversal of 21303202244 is 44220230312.

It is not an unprimeable number, because it can be changed into a prime (21303202241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61927742 + ... + 61928085.

It is an arithmetic number, because the mean of its divisors is an integer number (3178966252).

Almost surely, 2^21303202244 is an apocalyptic number.

It is an amenable number.

21303202244 is a deficient number, since it is larger than the sum of its proper divisors (16844392780).

21303202244 is a wasteful number, since it uses less digits than its factorization.

21303202244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123855874 (or 123855872 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21303202244 its reverse (44220230312), we get a palindrome (65523432556).

The spelling of 21303202244 in words is "twenty-one billion, three hundred three million, two hundred two thousand, two hundred forty-four".