21104443230 has 128 divisors (see below), whose sum is σ = 58276108800. Its totient is φ = 4847952384.

The previous prime is 21104443207. The next prime is 21104443231. The reversal of 21104443230 is 3234440112.

It is a self number, because there is not a number n which added to its sum of digits gives 21104443230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104443231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 475216 + ... + 517724.

It is an arithmetic number, because the mean of its divisors is an integer number (455282100).

Almost surely, 2^21104443230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21104443230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29138054400).

21104443230 is an abundant number, since it is smaller than the sum of its proper divisors (37171665570).

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

21104443230 is a wasteful number, since it uses less digits than its factorization.

21104443230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42618.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21104443230 its reverse (3234440112), we get a palindrome (24338883342).

The spelling of 21104443230 in words is "twenty-one billion, one hundred four million, four hundred forty-three thousand, two hundred thirty".