21200244230 has 48 divisors (see below), whose sum is σ = 44412338880. Its totient is φ = 7255691520.

The previous prime is 21200244217. The next prime is 21200244283. The reversal of 21200244230 is 3244200212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494750 + ... + 535889.

It is an arithmetic number, because the mean of its divisors is an integer number (925257060).

Almost surely, 2^21200244230 is an apocalyptic number.

21200244230 is an abundant number, since it is smaller than the sum of its proper divisors (23212094650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200244230 is a wasteful number, since it uses less digits than its factorization.

21200244230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030685 (or 1030674 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21200244230 its reverse (3244200212), we get a palindrome (24444444442).

The spelling of 21200244230 in words is "twenty-one billion, two hundred million, two hundred forty-four thousand, two hundred thirty".