21132234441644 has 24 divisors (see below), whose sum is σ = 36995361343248. Its totient is φ = 10562131546560.

The previous prime is 21132234441629. The next prime is 21132234441649. The reversal of 21132234441644 is 44614443223112.

It is not an unprimeable number, because it can be changed into a prime (21132234441649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499759727 + ... + 499802009.

It is an arithmetic number, because the mean of its divisors is an integer number (1541473389302).

Almost surely, 2^{21132234441644} is an apocalyptic number.

It is an amenable number.

21132234441644 is a deficient number, since it is larger than the sum of its proper divisors (15863126901604).

21132234441644 is a wasteful number, since it uses less digits than its factorization.

21132234441644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86465 (or 86463 counting only the distinct ones).

The product of its digits is 442368, while the sum is 41.

Adding to 21132234441644 its reverse (44614443223112), we get a palindrome (65746677664756).

The spelling of 21132234441644 in words is "twenty-one trillion, one hundred thirty-two billion, two hundred thirty-four million, four hundred forty-one thousand, six hundred forty-four".