21444311210 has 32 divisors (see below), whose sum is σ = 44153665920. Its totient is φ = 7345726272.

The previous prime is 21444311171. The next prime is 21444311219. The reversal of 21444311210 is 1211344412.

It is not an unprimeable number, because it can be changed into a prime (21444311219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 58940 + ... + 215319.

It is an arithmetic number, because the mean of its divisors is an integer number (1379802060).

Almost surely, 2^21444311210 is an apocalyptic number.

21444311210 is an abundant number, since it is smaller than the sum of its proper divisors (22709354710).

21444311210 is a wasteful number, since it uses less digits than its factorization.

21444311210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275390.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21444311210 its reverse (1211344412), we get a palindrome (22655655622).

The spelling of 21444311210 in words is "twenty-one billion, four hundred forty-four million, three hundred eleven thousand, two hundred ten".