21455033541344 has 48 divisors (see below), whose sum is σ = 45495470073312. Its totient is φ = 9900870547968.

The previous prime is 21455033541341. The next prime is 21455033541353. The reversal of 21455033541344 is 44314533055412.

It is a super-4 number, since 4×21455033541344⁴ (a number of 54 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21455033541295 and 21455033541304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455033541341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 941099 + ... + 6617834.

It is an arithmetic number, because the mean of its divisors is an integer number (947822293194).

Almost surely, 2^{21455033541344} is an apocalyptic number.

It is an amenable number.

21455033541344 is an abundant number, since it is smaller than the sum of its proper divisors (24040436531968).

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

21455033541344 is a wasteful number, since it uses less digits than its factorization.

21455033541344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7565779 (or 7565771 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 44.

Adding to 21455033541344 its reverse (44314533055412), we get a palindrome (65769566596756).

The spelling of 21455033541344 in words is "twenty-one trillion, four hundred fifty-five billion, thirty-three million, five hundred forty-one thousand, three hundred forty-four".