21444332110 has 16 divisors (see below), whose sum is σ = 38609302176. Its totient is φ = 8575620768.

The previous prime is 21444332099. The next prime is 21444332149. The reversal of 21444332110 is 1123344412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221034 + ... + 302893.

It is an arithmetic number, because the mean of its divisors is an integer number (2413081386).

Almost surely, 2^21444332110 is an apocalyptic number.

21444332110 is a deficient number, since it is larger than the sum of its proper divisors (17164970066).

21444332110 is a wasteful number, since it uses less digits than its factorization.

21444332110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528027.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21444332110 its reverse (1123344412), we get a palindrome (22567676522).

The spelling of 21444332110 in words is "twenty-one billion, four hundred forty-four million, three hundred thirty-two thousand, one hundred ten".