21344454413344 has 96 divisors (see below), whose sum is σ = 42470238142080. Its totient is φ = 10559015718912.

The previous prime is 21344454413341. The next prime is 21344454413351. The reversal of 21344454413344 is 44331445444312.

It is a junction number, because it is equal to n+sod(n) for n = 21344454413294 and 21344454413303.

It is not an unprimeable number, because it can be changed into a prime (21344454413341) 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, 2030286232 + ... + 2030296744.

It is an arithmetic number, because the mean of its divisors is an integer number (442398313980).

Almost surely, 2^{21344454413344} is an apocalyptic number.

It is an amenable number.

21344454413344 is a deficient number, since it is larger than the sum of its proper divisors (21125783728736).

21344454413344 is a wasteful number, since it uses less digits than its factorization.

21344454413344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402 (or 12394 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 46.

Adding to 21344454413344 its reverse (44331445444312), we get a palindrome (65675899857656).

The spelling of 21344454413344 in words is "twenty-one trillion, three hundred forty-four billion, four hundred fifty-four million, four hundred thirteen thousand, three hundred forty-four".