21314045243544 has 128 divisors (see below), whose sum is σ = 54369876369600. Its totient is φ = 6960447037440.

The previous prime is 21314045243531. The next prime is 21314045243567. The reversal of 21314045243544 is 44534254041312.

21314045243544 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21314045243544² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21314045243496 and 21314045243505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3115629564 + ... + 3115636404.

Almost surely, 2^{21314045243544} is an apocalyptic number.

21314045243544 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 21314045243544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27184938184800).

21314045243544 is an abundant number, since it is smaller than the sum of its proper divisors (33055831126056).

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

21314045243544 is a wasteful number, since it uses less digits than its factorization.

21314045243544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125 (or 10121 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 42.

Adding to 21314045243544 its reverse (44534254041312), we get a palindrome (65848299284856).

The spelling of 21314045243544 in words is "twenty-one trillion, three hundred fourteen billion, forty-five million, two hundred forty-three thousand, five hundred forty-four".