21421333230 has 64 divisors (see below), whose sum is σ = 56099582208. Its totient is φ = 5191695360.

The previous prime is 21421333201. The next prime is 21421333253. The reversal of 21421333230 is 3233312412.

It is a self number, because there is not a number n which added to its sum of digits gives 21421333230.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1927269 + ... + 1938351.

It is an arithmetic number, because the mean of its divisors is an integer number (876555972).

Almost surely, 2^21421333230 is an apocalyptic number.

21421333230 is an abundant number, since it is smaller than the sum of its proper divisors (34678248978).

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

21421333230 is a wasteful number, since it uses less digits than its factorization.

21421333230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16961.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21421333230 its reverse (3233312412), we get a palindrome (24654645642).

The spelling of 21421333230 in words is "twenty-one billion, four hundred twenty-one million, three hundred thirty-three thousand, two hundred thirty".