21440551432210 has 8 divisors (see below), whose sum is σ = 38592992577996. Its totient is φ = 8576220572880.

The previous prime is 21440551432207. The next prime is 21440551432291. The reversal of 21440551432210 is 1223415504412.

It can be written as a sum of positive squares in 2 ways, for example, as 20256561531441 + 1183989900769 = 4500729^2 + 1088113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072027571601 + ... + 1072027571620.

Almost surely, 2^{21440551432210} is an apocalyptic number.

21440551432210 is a deficient number, since it is larger than the sum of its proper divisors (17152441145786).

21440551432210 is a wasteful number, since it uses less digits than its factorization.

21440551432210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144055143228.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 21440551432210 its reverse (1223415504412), we get a palindrome (22663966936622).

The spelling of 21440551432210 in words is "twenty-one trillion, four hundred forty billion, five hundred fifty-one million, four hundred thirty-two thousand, two hundred ten".