21043320230 has 32 divisors (see below), whose sum is σ = 39881928960. Its totient is φ = 7972236000.

The previous prime is 21043320229. The next prime is 21043320283. The reversal of 21043320230 is 3202334012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855605 + ... + 879855.

It is an arithmetic number, because the mean of its divisors is an integer number (1246310280).

Almost surely, 2^21043320230 is an apocalyptic number.

21043320230 is a deficient number, since it is larger than the sum of its proper divisors (18838608730).

21043320230 is a wasteful number, since it uses less digits than its factorization.

21043320230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28844.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21043320230 its reverse (3202334012), we get a palindrome (24245654242).

The spelling of 21043320230 in words is "twenty-one billion, forty-three million, three hundred twenty thousand, two hundred thirty".