21548454323841 has 16 divisors (see below), whose sum is σ = 33603827406400. Its totient is φ = 13609550098944.

The previous prime is 21548454323797. The next prime is 21548454323881. The reversal of 21548454323841 is 14832345484512.

21548454323841 is a `hidden beast` number, since 2 + 1 + 5 + 484 + 54 + 32 + 3 + 84 + 1 = 666.

It is not a de Polignac number, because 21548454323841 - 2¹⁸ = 21548454061697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21548454323881) 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, 21002391616 + ... + 21002392641.

It is an arithmetic number, because the mean of its divisors is an integer number (2100239212900).

Almost surely, 2^{21548454323841} is an apocalyptic number.

It is an amenable number.

21548454323841 is a deficient number, since it is larger than the sum of its proper divisors (12055373082559).

21548454323841 is a wasteful number, since it uses less digits than its factorization.

21548454323841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42004784285 (or 42004784279 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 54.

The spelling of 21548454323841 in words is "twenty-one trillion, five hundred forty-eight billion, four hundred fifty-four million, three hundred twenty-three thousand, eight hundred forty-one".