21402241303344 has 160 divisors (see below), whose sum is σ = 61460704191744. Its totient is φ = 6362406435840.

The previous prime is 21402241303309. The next prime is 21402241303361. The reversal of 21402241303344 is 44330314220412.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 264044487 + ... + 264125529.

Almost surely, 2^{21402241303344} is an apocalyptic number.

21402241303344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21402241303344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30730352095872).

21402241303344 is an abundant number, since it is smaller than the sum of its proper divisors (40058462888400).

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

21402241303344 is a wasteful number, since it uses less digits than its factorization.

21402241303344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90555 (or 90549 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 21402241303344 its reverse (44330314220412), we get a palindrome (65732555523756).

The spelling of 21402241303344 in words is "twenty-one trillion, four hundred two billion, two hundred forty-one million, three hundred three thousand, three hundred forty-four".