21544412124054 has 8 divisors (see below), whose sum is σ = 43088824248120. Its totient is φ = 7181470708016.

The previous prime is 21544412124049. The next prime is 21544412124089. The reversal of 21544412124054 is 45042121444512.

It is a sphenic number, since it is the product of 3 distinct primes.

21544412124054 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795367676999 + ... + 1795367677010.

It is an arithmetic number, because the mean of its divisors is an integer number (5386103031015).

Almost surely, 2^{21544412124054} is an apocalyptic number.

21544412124054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21544412124054 is a wasteful number, since it uses less digits than its factorization.

21544412124054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590735354014.

The product of its (nonzero) digits is 204800, while the sum is 39.

Adding to 21544412124054 its reverse (45042121444512), we get a palindrome (66586533568566).

The spelling of 21544412124054 in words is "twenty-one trillion, five hundred forty-four billion, four hundred twelve million, one hundred twenty-four thousand, fifty-four".