21443202210 has 32 divisors (see below), whose sum is σ = 54172301760. Its totient is φ = 5417229888.

The previous prime is 21443202173. The next prime is 21443202211. The reversal of 21443202210 is 1220234412.

It is not an unprimeable number, because it can be changed into a prime (21443202211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18809257 + ... + 18810396.

It is an arithmetic number, because the mean of its divisors is an integer number (1692884430).

Almost surely, 2^21443202210 is an apocalyptic number.

21443202210 is an abundant number, since it is smaller than the sum of its proper divisors (32729099550).

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

21443202210 is a wasteful number, since it uses less digits than its factorization.

21443202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37619682.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21443202210 its reverse (1220234412), we get a palindrome (22663436622).

The spelling of 21443202210 in words is "twenty-one billion, four hundred forty-three million, two hundred two thousand, two hundred ten".