21444311454 has 32 divisors (see below), whose sum is σ = 43948586880. Its totient is φ = 6973293600.

The previous prime is 21444311453. The next prime is 21444311489. The reversal of 21444311454 is 45411344412.

It is a super-3 number, since 3×21444311454³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444311453) 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, 184837 + ... + 277584.

It is an arithmetic number, because the mean of its divisors is an integer number (1373393340).

Almost surely, 2^21444311454 is an apocalyptic number.

21444311454 is an abundant number, since it is smaller than the sum of its proper divisors (22504275426).

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

21444311454 is a wasteful number, since it uses less digits than its factorization.

21444311454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462616.

The product of its digits is 30720, while the sum is 33.

Adding to 21444311454 its reverse (45411344412), we get a palindrome (66855655866).

The spelling of 21444311454 in words is "twenty-one billion, four hundred forty-four million, three hundred eleven thousand, four hundred fifty-four".